State Committee for Scientific Research – KBN For KBN use only
00-529 Warszawa Nr.
ul. Wspólna 1/3 Group
POLAND
GRANT APPLICATION
Project Title: Strategies for searches and discovery potential of the Higgs boson(s)
in final states including tau-leptons and b-quarks and for the proton-proton collision
at 14 TeV.
A. APPLICANT DATA
1. Name and address of the organization where work will be performed (include department,
institute, laboratory, and chair, as applicable):
The H. Niewodniczanski Institute of Nuclear Physics
Polish Academy of Sciences
Radzikowskiego 152
31-342 Kraków, Poland
2. Principal Investigator (include title, first name, last name):
Prof. dr hab. Elżbieta Richter-Wąs
3. Principal Investigator’s employer, if different from above organization (include department,
institute, laboratory, and chair, as applicable):
Prof. dr hab. Elżbieta Richter-Wąs
Chełmońskiego – Deptak 24
31-303 Kraków, Poland
tel: (+48 12) 6380538
The H. Niewodniczanski Institute of Nuclear Physics
Polish Academy of Sciences
Radzikowskiego 152
31-342 Kraków, Poland
tel: (+48 12) 6628000
e-mail: Elzbieta-Richter-Was@ifj.edu.pl
B. GENERAL DATA
1. Funding period: 24.months
2. Number of personnel involved in the project: 4
3. Type of project (pick one): Individual Project – Doctoral Dissertation Grant – Solicited
Project
4. Requested funding amount (in Polish zlotys1 - zł): 114 400 PLN
5. Keywords: theoretical physics, elementary particle physics, Higgs particle(s), Standard
Model, Minimal Supersymetric Standard Model, Monte Carlo methods, b-jet identification,
tau-lepton physics, tau-lepton identification.
6. Project summary (not to exceed 1 page; may be published by KBN if grant is awarded):
The goal of the project is to prepare strategies for searches of the Higgs bosons(s) in the
proton-proton collision at 14 TeV, and final states with tau-leptons and b-jets. Following
topics will be studied: (a) Monte Carlo simulation for signal and background processes in
searches of the Higgs boson(s) of the Standard Model and of the Minimal Supersymmetric
extension, decaying to the tau-leptons and produced with b quarks or t-quarks; (b) Monte
Carlo simulations of the physics potential of the ATLAS for identifying hadronic tau-lepton
decays and reconstruction of correspoding multi-jet final states;(c) continuation of the
development of the Monte Carlo program AcerMC for specific background processes to the
Higgs boson(s) searches; (d) continuation of the adaptation of the package for fast detector
simulation, where the crucial detection performance have been parametrised consistently with
results obtained from full detector simulation of its response to the passing particles; (e)
continuation of the adaptation of the package for simulation of the decays of tau-leptons,
radiative corrections in their decays and, its generic interface to the generators for the tau-
leptons productions.
C. STAFF INFORMATION
For the Principal Investigator and each senior staff member, provide the following
biographical information:
1. Name
Elżbieta Richter-Wąs
Chełmońskiego – Deptak 24
31-303 Kraków, Poland
tel: (+48 12) 6380538
tel: (+48 12) 6628000
e-mail: Elzbieta-Richter-Was@ifj.edu.pl
2. Educational history including, for each degree, the field, institution, and date obtained
M.Sc.: 1982 Technical Academy of Cracow, in mechanics
M.Sc.: 1984 Jagellonian University Cracow, in theoretical physics
Ph.D. : 1988 Institute of Nuclear Physics, Cracow, in theoretical physics
Habilitation: 1997 Jagellonian University Cracow, in theoretical physics
Professor: 2002 Jagellonian University Cracow, in theoretical physics
1
Polish zloty annual 2002 mid - rate against the euro is estimated at 3,95 (Ministry of Finance - draft budget
for the Year 2002)
3. Academic and professional appointments, in reverse chronological order
Jagellonian University, Cracow
1989 - 1991, assistent,
1991 - till now, assistent. professor
Institute of Nuclear Physics, Cracow
1996 - 2002 docent
2002 - professor
4.
a) Brief descriptions of research projects completed in the last four years,
(1) Coordinator of the Higgs Working Group of ATLAS Collaboration in years 1995-
2003; Main editor of the Higgs Physics section of the ATLAS Detector and Physics
Performance Technical Design Report (1999); organiser of the Higgs Boson Physics
sessions during ATLAS Physics Workshops in 1998 (Grenoble), 2001 (Lund), 2003
(Atheny)
(2) Preparation of the complex analysis for the ATLAS detector potential for searching
for the Higgs boson(s) in Minimal Supersymmetric Standard Model, E. Richter-Wąs et
al., ATLAS Internal Note ATL-PHYS-96-074, Int. Of Mod. Phys. A13 (1998) 1371-
1494;
(3) Analysis of the ATLAS detector potential for searching for the Higgs boson(s) in the
Standard Model and its supersymmetric extension in the final states including multi-b-
jet final states: Z. Phys. C67:2130226,1995; Z. Phys. C76:665-676,1997; Acta Phys.
Polon. B30:1001-1040,1999, Acta Phys. Polon. B31:1973-2019,2000; Acta Phys.
Polon.B31-1931-1972,2000, Eur.Phys.J.C25:379-89,2002, Eur. Phys. J. C 29, 541-548
(2003), Eur. Phys.J.C25:379-389,2002, Eur. Phys. J. C29, 541-548 (2003).
(4) Construction of the Monte Carlo generators, AcerMC, based on the exact matrix
element calculations for selected background processes with multi-b-jet final states:
Comp. Phys. Commun. 149 (2003) 142.
(5) Construction of the fast simulation package for ATLAS detector Atlfast, used in the
several physics analyses leading to preparation of the physics program of the ATLAS
detector E. Richter-Wąs, D. Froidevaux and L. Poggioli, ATLAS Internal Notes:
ATL-PHYS-96-079 (1996), ATL-PHYS-98-132 (1998);
http://atlas.web.cern.ch?Atlas/GROUPS/PHYSICS/HIGGS/Atlfast.html
b) ... including up to 10 publications (provide publication data).
1. E. Richter-Wąs et al. Minimal Supersymmetric Standard Model Higgs rates and
background in Atlas, Int. J. Mod. Phys. A13:1371
2. E.Richter-Wąs, D. Froidevaux, L. Poggiolo, ATLFAST-2.0- a package for the
particle level simulation, ATLAS Internal Note ATL-PHYS-98-132 (1998)
3. D. Zeppenfeld, R. Kinnunen, A. Nikitenko, E. Richter-Wąs, Measuring Higgs boson
coupling at the LHC, Phys. Rev. D62 (2000) 013009
4. E. Richter-Wąs, Prospect for the observability of the WH and ZH, H bb
miss
channel in 14 TeV pp and 2 TeV pp collisions. ( E T bb final states), Acta
Phys. Polon. B31 1931 2000.
5. E. Richter-Wąs, Revisiting the observability of the WH and ZH, H bb channel
in 14 TeV pp and 2 TeV pp collisions. ( bb and bb final states), Acta Phys.
Plon. B31 1931 2000
6. T. Pierzchała, E. Richter-Was, Z. Wąs, M. Worek, Spin effect in τ lepton pair
production at LHC, Acta Phys. Polon. B32 1277 2001.
7. B. Kersevan and E. Richter-Wąs, What is the bb W , bb Z and tt bb background to
the light Higgs boson searches at LHC, hep-ph/0203148, Eur. PHys. J. C25;379-
389, 2002
8. B. Kersevan and E. Richter-Wąs, The Monte Carlo events generator, AcerMc
version 1.0 with interface to PYTHIA 6.2 and HERWIG 6.3, hep-ph/0201302,
Com. Phys. Commun. 149 92003) 142
9. S. Asai et al. Prospects for the Search of a Standard Model Higgs Boson in
ATLAS using Vector Boson Fusion, EPJ-direct, DOI:10.1140/epjcd/s2003-01-010-
8, 30 July 2003
10. B. Kersevan, M. Malawski and RE. Richter-Wąs, Prospects for observing an
invisibly decaying Higgs boson in the tt H production at LHC, hep-ph/0207014,
Eur. Phys. J.C 29, 541-548 (2003)
5. Awards received
Coordinator of the Higgs Working Group of ATLAS Collaboration (1995-2003);
Main editor of the Higgs Section of ATLAS Physics Performance Technical Design
Report LHCC 99-14/15.
Coordinator of the Higgs Working Group during Les Houches Summer School of
Physics (December 1998-June 1999).
Member of ATLAS Collaboration Editorial Board (1998-2000).
Member of ATLAS Collaboration Physics Coordination (1998-2003)
Member of ATLAS Collaboration Advisory Board (998-2003)
D. PROJECT DESCRIPTION, METHODOLOGY, AND EXPECTED RESULTS
1. What problem is being proposed and why? Why should this work be undertaken in
Poland?
The main goal of the project is an active participation in the world-wide research
program of preparing searches strategies and analysis for data which will be collected in the
processes of operation of LHC accelerator. One of the main goal for a building this
accelerator is discovery or definitive exclusion of the existence of the Higgs boson(s) and
supersymmetric particles. This is therefore of primary interest for the searches strategies of
ATLAS and CMS Collaborations at LHC. Results, achieved in years 1994 - 1998, by the
coordinator of the proposed project, have been used as the leading ones, for preparation of the
Technical Design Reports of ATLAS Collaboration. Since 1998, her activity is continued. She
takes a role of the ATLAS Collaboration Higgs Working Group coordinator.
2. What is the present state of knowledge in the field, and to what extent does this project
verify it? How will the project advance discovery and understanding in its field or
across fields? Is this a new or a continued problem?
One of the most important problem of the Standard Model is an experimental
confirmation of existence of the mechanism responsible for the electroweak symmetry
breaking, namely discovery of the Higgs boson. Experimental confirmation of the existence
of this particle is the key issue to confirm the Standard Model (SM) which describes
electroweak interactions and which lead to theoretical predictions being in agreement with
experimental measurements at LEP and SLAC with unprecedentedly high precisions. The
most widely accepted theory of the extension of the Standard Model, so called Minimal
supersymmetric Standard Model (MSSM) [1], predicts existence of the five physics states for
the Higgs bosons and also existence of the supersymmetric particles, partners to the known
fermions (quarks, leptons) and gauge bosons. Confirmation of the Standard Model or one of
its extension, is the fundamental challenge for the high energy physics of elementary particles
and is mandatory for the further understanding of the fundamental forces in our Universe,
Within the frame of the Standard Model, rather challenging will be discovery in the so called
intermediate mass range of the Higgs boson. 115 < mH < 140 GeV , (lower limit comes from
results of LEP experiments), where searches strategies are limited by the relatively small
number of expected signal events with respect to expected background events. Presently the
most promising decay modes are: H , H and H bb . The channels: H bb
and H are very interesting as possible for observation already at the initial stage of the
data taking (so called low luminosity operation) under condition that performance for the
identification and reconstruction of b-jets and tau-jets will be excellent. Very important will
be also performance for the calorimetric reconstruction of the missing transverse energy and
of the hadronic jets. Expected performance for both channels have been already discussed in
[2, 3]. Within proposed project we plan to complete these analyses with evaluating different
production mechanisms: tt H , bb H , ZH i WH for H decays, where the basic problems
are combinatoric background from signal itself (channel tt H ) and good understanding of the
backgrounds from tt and Z, W productions. More complete information concerning prepared
scenarios for the Higgs boson searches in Standard Model can be found in [4] (coordinator of
this project has been main editor of the respective section of this document).
In contrast to the Standard Model, where the only unknown in the Higgs sector is the
mass of the Higgs boson, in the MSSM the Higgs sector depends strongly, via radiative
corrections (mass relations, couplings), from the assumed model for the Supersymmetry
(mass spectrum of particles). In particular, predictions for the maximal allowed mass for the
lightest of the neutral Higgs bosons are strongly modified by the radiative corrections. This
fact made an initial assumption, of the allowed mass range within reach of the LEP2
experiments, not valid. Completed few years ago, by the coordinator of this project, analysis
of the overall LHC potential for the MSSM Higgs boson(s) discovery [5] is one of the
established positions in the literature (still 5 new citations in 2003), due to the completeness
of the analysis, and due to the realistic assumptions concerning performance of the LHC
detectors. In [5] it was shown that with assumption of relatively heavy supersymmetric
particles (around 1 TeV), it will be possible to identify at least one of the Higgs boson in the
mass range 50 - 500 GeV and in the full range of tan β (ratio of the vacuum expectation value
of the Higgs doublets). Within the proposed project we plan to extend this analysis by the
more detailed studies of the observability potential in different production modes and with
Higgs boson(s) decays to the tau-leptons. Very interesting, and so far neglected in the
literature, will be more detailed studies on the light Higgs observability (mass of 120 GeV)
decaying to the tau-leption pair, with the signature of lepton-lepton and lepton-hadron final
state. So far only lepton-hadron final state was considered as promising for observability in
the MSSM Higgs bosons sector. New analyses proposed in context of the Standard Model
sector for the decay to the tau-lepton and for Higgs boson produced in the vector-boson-
fusion indicates, that the discovery potential of the lepton-lepton and lepton-hadron final state
should be comparable. Confirmation of this results also for the MSSM Higgs sector will add
significantly to the overall discovery potential in this mass range for LHC experiments.
The project team is qualified sufficiently and well prepared to complete these analyses
within the time allocated for the project.
3. What is the proposed methodology? How will it solve the problem? What equipment
will be used? Does the applicant have the required equipment skills and access?
The preparation of the physics program for searching for the Higgs boson is the
leading area of the activity of the project coordinator since several years. First steps of the
preparation of this program have been already documented in the [2,3] and [5]. Since 1995 the
coordinator of the project is coordinating activity of the Higgs Working Group of ATLAS
Collaboration. The staff members of the project have also long term experience with
phenomenological analyses in the Higgs sector.
Searching for the Higgs boson(s) in proton-proton collision at 14 TeV will be
a challenging process of extracting signal from the overwhelming background from other
production processes. The number of expected observed signal events of the Higgs production
in one year of data taking at low luminosity varies from few to few hundreds (depending on
the production mechanism and decay mode involved), with signal-to-background ratio as low
as few percent only in some cases. Complete analysis of the observalibility potential of such
events requires: (a) reliable, well understood theoretical predictions for the signal (production
and decays) and backgrounds, (b) quantification of these predictions including realistic
expected detector performance, (c) defining optimal strategy for the data analysis, taking into
account possible modifications of the theoretical predictions.
Preparation of searches strategies will be the key element to guarantee discovery or
exclusion of the existence of the Higgs boson, so the success of such fantastic project as the
observation of the proton-proton collisions at 14 TeV will be.
Within the project we plan allocate considerable effort to complete and develop
theoretical tools for simulating signal and background processes. The coordinator of the
project is the coauthor of the Monte Carlo generator AcerMc [6], based on the exact matrix
element calculations and very efficient phase-space generation the package dedicated to
generation of the background processes particularly relevant for the planned analyses of the
Higgs boson(s) discovery potential. Package AcerMC will be developed further in the process
of the realisation of the project. The project team has close collaboration with the world
known expert for modeling tau-lepton decays and the leading author of the package TAUOLA
[7], used by all collaborations analysing with data containing production and decays of the
tau-leptons. It is worth to stress at this point that some of the publications concerning
TAUOLA package have already more than 200 citations. The last upgrade of this package [8]
allows for simulation of the transverse and longitudinal spin correlations for the tau-lepton
production, effects which will be important for the optimization of the physics observables of
the prepared analyses. The TAUOLA package is used presently for the tau-lepton decays in
Belle (KEK Japan) and BaBar (SLAC, USA) collaborations, we plan to continue our contacts
with those collaborations and in the future, use their measurements to update
parametrisations for modeling semi-hadronic tau-lepton decays in the simulations for LHC
physics. Package TAUOLA will be adopted further to LHC needs in the process of the
realisation of the project.
Very important for the project will be inclusion of the existing NLO and even NNLO
calculations for the one of the productions processes, namely bb H . The latest theoretical
papers [9], indicates significant progress in understanding description of this production
mechanism. Within the project we will try to implement, in form of Monte Carlo generator,
existing theoretical calculations. As the overall efficiency for the signal reconstruction in the
H , decay is very sensitive to the topology of the events (primarily modeling of the
transverse momenta of the Higgs boson), for the discussed analyses, it will be not sufficient to
include the higher order corrections in the form of the so called K-factors only.
Preparing strategies for searches and for discovery of New Physics requires very
detailed understanding not only of theoretical decription of the physics processes but also
inclusion of the realistic parameters for the performance of the detector. In case of
complicated analysis (as the one including tau-leptons and b-quarks in the final states), very
efficient is use of fast simulation of the detector for the first feasibility studies, before
embarking into time consuming full simulation of all physics processes which lead to the final
detector response. Such package for the fast simulation of the ATLAS detector (the
coordinator of the project is one of the authors of the package) have been continously
upgraded [10], and since 7 years acknowledged as the official package of the ATLAS
Collaboration and succesfully used for different simulation studies, eg. [3,4]. This package,
after minor adaptations could be used for simulation of any modern detector. In its present
version package contains parametrisations allowing for simulation and reconstruction of the
detector response for isolated electrons and muons, reconstruction of jets, identification and
reconstruction of b-jets, tau-jets, effects of pile-up, tracks reconstruction in the inner detector,
etc.
The very important aspect of the presented project is analysis of the realistic capability
of the tau-jet reconstruction and identification. Well established techniques relies on the
reconstuction of tracks coming from the charged hadrons and on the identification of the
characteristic shape (very narrow) of the matching hadronic and electromagnetic cascade
reconstructed in the calorimeter. Analysis of the expected detection performance requires
preparation of the algorithms and interpretation of the information coming from the different
subsystems of the detector, and their optimization based on the Monte Carlo simulation of the
full detector response. Such standard algorighms have been already developed by LHC
Collaborations, eg.[4]. Within the project we plan to optimize further existing algorithms
including modern numerical techniques, like neural network approach. We believe that
obtained results/algorithms will be the very valuable ingredients in the process of preparation
of the future data analysis. They will be also implemented in the package [10], significantly
improving realibility of the prepared predictions for the observability potential of the Higgs
boson(s) in the final states including tau-jets.
4. What are the expected results of this project (“know-how”, patents, methods,
equipment), and how will they be disseminated (publications, conference
presentations, PhD theses)?
Proposed project represents unique attempt to present theoretical predictions in the
form of the observability potential of the signal in the experimental data, based on the realistic
estimates of the detector performance. The project team is strongly convinced that results
obtained in the process of project realisation will become the starting poing for the first data
analyses in 2007 year, due to the realistic assumptions. To achieve this goal it is nevertheless
mandatory to keep very close contacts both with the experimental teams of the LHC
Collaborations which are preparing details of the experimental analyses of the respective
forthcoming data, and also with Collaborations which presently are analysing data of tau-
leptons. Such contacts are already well established, and will be for sure expanded during
realisation of the proposed project.
Within the project, preparation of the Ph.D. thesis will be prepared by one of the
member of the project team (T. Szymocha) under supervision of the project coordinator. The
theses are due to be completed by fall of 2006.
1. H.P. Niles , Phys. Rep. 110, 1 (1984); H. Haber and G. Kane, Phys Rep. 117, 75
(1985)
2. D. Froidevaux adn E. Richter-Wąs, „Can the H b b be Observable at LHC
?, ATLAS Internal Note, PHYS-No-043 91994), CERN-TH.7459/94, Z. Phys. C
C67 213 (1995)
E. Richter-Wąs and M. Sapiński „Search for the SM and MSSM Higgs boson
in the ttH , H bb channel. ATLAS Internal Note, PHYS-No-132 (1998)
3. S. Asai et al. „Prospects for the Search of a Standard Model Higgs Boson in
ATLAS using Vector Boson Fusion, EPJ-direct, DOI:10.1140/epjcd/s2003-01-
010-8, 30 July 2003
4. ATLAS Collaboration, „ATLAS Performanced and Physics Detector
Technical Design Report
5. E. Richter-Wąs, D. Froidevaux, F. Gianotti, L. Poggioli, D. Cavalli, S. Resconi,
„Standard Model and Minimal Supersymmetric Standard Model Higgs rates
and back-ground in ATLAS”, ATLAS Internal Note PHYS-No-074 (1996),
CERN TH-111/96 (April 1996), Int. J. of Mod. Phys. A13 (1998), 1371-1494.
6. B. Kersevan and E. Richter-Wąs, „The Monte Carlo event generator, AcerMc
version 1.0 with interface to PYTHIA6.2 and HERWIG 6.3, hep-ph/0201302,
Comp. Phys. Commun. 149 (2003) 142
7. S. Jadach, J.H. Kuhn and Z. Was, Comput. Phys. Commun. 64 (1190) 275. M.
Jeżabek, Z. Wąs, S. Jadach and J. H. Kuhn, Comp. Phys. Commun. 70 (1992). S.
Jadach, Z. Wąs, R. Decker and J.H. Kuhn, Comput. Phys. Commun. 76 (1993)
361.
8. P. Golonka, B. Kersevan, T. Pierzchała, E. Richter-Wąs, Z. Wąs „The tauola-
photos-F Environment for the TAUOLA and PHOTOS packages, release II,
CERN-TH/2003-287, hep-ph/032240
9. R.V. Harlander and B. W. Kilgore, „Higgs Boson production in bottom quark
fusion at next-tonext-to leading oder, Phys. Rev. D68:013001, 2003
S.Dittmaier, M. Kramer, M. Spira, „Higgs radiation of bottom quarks at the
Tevatron and LHC, hep-ph/0309204
S. Dawson, C.B. Jackson, L.H. Orr, L. Reina „Theoretical progress for the
associated production of a Higgs boson with heavy quarks at hadron
colliders, hep-ph/031216
F. Maltoni Z. Sullivan, S. Willebrock, „Higgs boson production via bottom-
quark fusion, Phys. Rev. D67:093005, 2003
10. E. Richter-Wąs, D. Froidevaux, L. Poggioli, „ATLFAST 2.0- a package for the
particle simulation, ATLAS Internal Note, ATL-PHYS-98-132 (1998)
E. Richter-Wąs, „ACERDET: a particle level fast simulation and
reconstruction package for phenomenological studies on high p(T) physics
at LHC, hep-ph/0207355.
E. SOLICITED PROJECTS ONLY: DOES THE APPLICANT MEET THE CALL
CRITERIA, PARTICULARLY THOSE CONCERNING INTERNATIONAL
COOPERATION?
F. PROJECT SCHEDULE - ANTICIPATED TASKS
Expected completion date Expected cost
No. Name and description of task
(mm/yy) (zł)
1. Simulation for the Higgs searches XII 2004 13600
2. Development of the Monte Carlo XII 2004 15000
1. Simulation for the Higgs searches XII 2005 27200
2. Development of the Monte Carlo XII 2005 15000
3. Simulation for tau and tau-id XII 2005 15000
3. Simulation for tau and tau-id 30.VI.2006 10000
4. Upgrade of the fast sim package 30.VI.2006 10000
5. Summary of the project results 30.VI.2006 8600
Total 114400
G. PROPOSED BUDGET
Item Funds for each budget year (zł)
No.
2004 2005 2006 Total
1 2 3 4 5 6 7
1 Direct costs, including: 22000 44000 22000 88000
1/ Salaries and benefits 2000 4000 2000 8000
2/ Equipment - - - -
3/ Other direct costs 20000 40000 20000 80000
2 Indirect costs 6600 13200 6600 26400
3 Total costs (1+2) 28600 57200 28600 114400
Details of direct cost items
1) Salaries and benefits
Principal Investigator person-months: 6 months/year = 12 person - months
Staff person-months: 3/year/person = 18 person- months
2) Equipment (type, estimated cost, planned month of purchase, and justification): none
3) Other direct costs (type of expenditure, amount, and relation to project plan): the
dominant position in the project budget are travel costs. Realisation of the proposed
project is not possible without close collaboration with different experimental groups
and without presentations of the partial results during collaboration meetings (ATLAS,
Belle, BaBar) and international workshops.
Planned travels:
Year Country Number Duration Planned cost
of trips of the single trip zł
2004 Switzerland, France, Norway 3 1- 4 weeks 15000
tickets, perdiems Task F 2004/1
2004 Participation in international conference 1 5000
1 week
or contact with collaborations: Belle, Task F 2004/2
BaBar (Japan, USA)
2005 Switzerland, France, Norway 6 1 – 4 weeks 30000
tickets, perdiems Task F 2005/1
2005 Participation in international conference 2 10000
1 week
or contact with collaborations: Belle,
Task F 2005/3
BaBar (Japan, USA)
2006 Switzerland, France, Germany, Norway 3 1 – 4 weeks 150000
tickets, perdiems Task F 2006/2
2006 Participation in international conference 1 5000
1 week
or contact with collaborations: Belle,
Task F 2006/1
BaBar (Japan, USA)
Total: 80000
Date Grantee organization Principal Investigator
Signature Signature
Staff information (continuation)
1) ZBIGNIEW WĄS
The H. Niewodniczanski Institute of Nuclear Physics
Polish Academy of Sciences
Radzikowskiego 152
31-342 Kraków
tel: (+48 12) 6628010, fax (+48 12) 6628012
e-mail: Zbigniew.Was@ifj.edu.pl, Zbigniew.Was@cern.ch
home page : http://hpjmiady.ifj.edu.pl/ , http://www.cern.ch.wasm/
2) Educational history:
M.Sc., 1982 Jagellonian University Cracow, in theoretical physics,
Ph.D., 1986 Jagellonian University Cracow, in theoretical physics,
Habilitation, 1991 Institute of Nuclear Physics Cracow, in theoretical physics.
3) Academic and professional appointments, in reverse chronological order
1982-1986, Jagellonian University Cracow
1986 - now, Institute of Nuclear Physics Cracow
4. Brief descriptions of research projects completed in the last four years,
a) activity of the years 2002 - 2003
1. At the begining on that period I was still active mainly in a field of LEP phenomenology,
I was adopting KKMC generator to work together with the programs for triple and quatric
anomalous WWγ and ZZγ couplings, in channel e e n . This work was helpful for
the final combination of data from four LEP experiments, but on the other hand was not
leading to publications. I was presenting some of the results in Moriond:
http://wasm.home.cern.ch/wasm/public/moriondtalk.ps.gz. Also, for LEP phenomenology
of value was the paper on "Electric charge screening in single W production with the
KoralW Monte Carlo".
2. I have worked on the observability of Higgs boson parity using its decay into pair of τ
leptons at LC. This lead to two publications. Developed tools turned out to be interesting
for LHC physics as well.
3. During the MC4LHC workshop I was mainly working on adopting TAUOLA (for τ
leptons decay) and PHOTOS (for bremsstrahlung in decay of heavy particles and
resonances) to LHC needs. This activity lead to two publications, of some interest for
electroweak section of the workshop, and seven talks: myself (2), Małgorzata Worek (1),
Borut Kersevan (1) and Piotr Golonka (3). The new tool for testing. MC-TESTER, was
proposed.
Published Monte Carlo programs:
1. PHOTOS: for radiative corrections in decays
2. TAUOLA : for process
3. KORALB: for process e e , with complete spin effects
4. KORALZ , KK: for process e e 2 f
5. BLUHMI: for process e e e e pod małymi kątami
6. KORALW: for process e e 4 f
7. YFSWW3: for process e e W W 4 f
8. MC-Tester: for universal tests of Monte Carlo programs
b) ... including up to 10 publications (provide publication data).
1. S. Jadach, B.F. Ward and Z. Wąs, The precision Monte Carlo event generator KK
for two-fermion final states in e+ e- collision, Comput. Phys. Commun. 130
(2000)260.
2. A. Jacholkowska, J. Kalinowski and Z. Was, Library of SM and anomalous WW
gamma couplings for the e+ e- fanti f (n ) gamma Monte Carlo programs,
Comp. Phys. Commun. 124 (2000)238.
3. S. Jadach, B.F. Ward and Z.Wąs, „Coherent exclusive exponentiation for precision
Monte Carlo calculations”, Phys. Rev. D 63 (2001) 113009
4. S. Jadach, W. Płaczek, M. Skrzypek, B.F. Ward and Z. Wąs „The Monte Carlo
program Koral W version 1.51 and the concurrent Monte Carlo KoralW &
YFSWW3 with all background graphs and first order corrections to W pair
production" Comput. Phys. Commun. 140 (2001) 475
5. A. E. Bondar, S.I Eidelman, A.I. Milstein, T. Pierzchala, N.I. Root, Z. Was and M.
Worek, „Novosibirsk hadronic currents for tau → 4pi channels of tau decay
library TAUOLA” Comput. Phys. Commun. 146 (2002) 139
6. G. R. Bower, T. Pierzchala, Z. Was and M. Worek „Measuring the Higgs boson’s
parity using tau → rho nu”, Phys. Lett. B 543 (2002) 227
7. P. Golonka, B. Kersevan, T. Pierzchala, E. Richter-Was, Z. Was and M. Worek „The
tauola-photos-F environment for the TAUOLA and PHOTOS packages, release
II”, arXif:hep-ph/0312240
8. K. Desch, A. Imhof, Z. Was and M. Worek „Probing the CP nature of the higgs
boson at linear colliders with tau spin correlations: The case of mixed scalar
pseudoscalar couplings”, Phys. Lett. B579, 157 (2004) [arXiv:hep-ph/0307331]
9. G. Nanava and Z. Wąs , „How to use SANC to improve the PHOTOS Monte Carlo
simlulation of bremsstrahlung in leptonic W-boson decays”, Acta Phys. Polon.
B34, 4561 (2003) [arXiv:hep-ph/0303260]
10. K. Desch, Z. Wąs and M. Worek „ Measuring the Higgs boson parity at a linear
collider using the tau impact parameter and tau rho nu decay”, Eur. Phys. J.
C29, 491 (2003) [arXiv:hep-ph/0302046]
All of the listed programs are heavily used by LEP experiments, the programs are also used
for simulations by Linear Collider projects, low energy e e , experiments such as BaBar,
Belle and for experiments at Tevatron and LHC
5. Awards received
Editor of Computer Physics Communication.