Dhiman Chakraborty
Address: Department of Physics, Northern Illinois University, DeKalb, IL 60115, USA.
Phone: 1-815-753-8804
e-mail: dhiman@nicadd.niu.edu
Home page: http://nicadd.niu.edu/~dhiman/
Born July 7, 1966.
EDUCATION
Ph.D., Physics, State University of New York at Stony Brook (1994).
B.Tech., Engineering Physics, Indian Inst. of Technology, Mumbai (1988).
PROFESSIONAL EXPERIENCE
Guest Scientist, Laboratoire de Physique Subatomique et de Cosmologie, Grenoble, France.
June 2008 - August 2009
On research leave from my university, I just completed a 14-month visit to
LPSC, Grenoble, as a guest scientist on a fellowship program sponsored by
the French federal research agency
CNRS/IN2P3 to collaborate with the ATLAS team at LPSC on studies of top quark production and decay at the LHC.
Presidential Research Professor (2011 - 2015)
Professor of Physics (2009 - present),Associate Professor of Physics (2007-2009), Assistant Professor of Physics (2007), Northern Illinois University. 2001 - present
Teaching: I have taught the following courses at the NIU Physics department:
- Elementary Astronomy (PHYS 162): General education elective for undergraduates; Fall '07.
- Fundamentals of Physics 2: Electromagnetism (PHYS 273): Undergraduate course for science and engineering majors; Spring '08.
- Analytical Mechanics 1 (PHYS 300): Core course for junior undergraduate Physics majors; Fall '01.
- Modern Physics (PHYS 461/561): Optional for senior undergraduate Physics majors and graduate students; Spring '11.
- Analytical Mechanics 2 (PHYS 500, formerly PHYS 400): Core course for senior undergraduate Physics majors; Spring '02, Spring '03.
- Classical Mechanics (PHYS 600, formerly PHYS 500): Core course for all gradute students of Physics; Fall '02; Fall '03, Fall '04, Fall '05, Fall '06, Fall '09.
- Introduction to Elementary Particle Physics (PHYS 684): Elective for physics
graduate students; Spring '01, Spring '06, Spring '07.
- Techniques in Experimental High Energy Physics (PHYS 690B): Elective for physics graduate students; Spring '05.
Research: I am involved in the following collaborative projects:
- Studies of proton-proton collisions with the ATLAS detector
at the Large Hadron Collider (CERN):
Leading the NIU team on ATLAS
has been my primary occupation since we joined ATLAS in June 2007.
Our responsibilities include monitoring and certification of the tile hadronic
calorimeter data quality (Tile DQM) and providing core support for ATLAS
detector simulation software, including development and validation.
I coordinate the validation of the simulation of ATLAS digitization
and also Tier0 software validation shifts.
We are also involved in simulation of disc pixel trackers in the
detector upgrade for future high-luminosity running.
Our physics interests lie in searches for new physics in the production
and decay of top quarks, e.g. charged Higgs bosons and Z'.
- Studies of proton-antiproton collisions with the DZero; detector at the Tevatron
(Fermilab):
I have been a member of the DZero; collaboration since 1989,
participating in many areas of development and operation of the detector,
as well as physics analyses.
Presently I am co-leading searches for charged Higgs bosons in decays of
pair-produced top quarks.
Recently my ex-student Mikhail Arov and I performed the first measurement of
top-antitop pair-production cross section using the ttbar -> tau +jets
final state at the Tevatron.
This result is peing prepared for publication.
With another of my students, Diego Menezes, I performed a search
for ttbar -> bH+ through
the disappearance of the SM ttbar signal (a pair of charged Higgs bosons is an
integral feature of supersymmetric extensions of the standard model).
This result has been accepted for publication in Physical Review D.
Currently I am working with Menezes to refine Arov's analysis, apply it on a
larger data set, and interpret it to search for t -> bH+,
which leads to enhancements of the said final state.
I have served as a co-convenor of the top physics group (1998-2000)
and tau identification group (2001-2005) of the DZero collaboration.
- Detector R&D for the
International Linear Collider
(ILC):
From 2001 to 2007 I led the ILC detector software efforts, i.e.,
simulation and algorithm development, at NIU/NICADD.
During this period our team made major contributions to the American and
international efforts in the areas of detector simulation and the development
of Particle-Flow Algorithms (PFA), for dramatic improvement in jet energy
measurement.
I was also involved in the R&D of a finely segmented scintillator-based
hadron calorimeter.
The detector development group at NIU independently established the
feasibility of such a device using a relatively new solid-state photodetection
technology based on compact arrays of tiny avalanche photodiodes operating in
the limited Geiger mode.
From 2002 to 2007 I served as a co-leader of the
American Linear
Collider Physics Group's (ALCPG) Calorimetry working group, which
coordinated research and development activities of 11 university and
national laboratory teams.
Since June 2008 I have been a member of the
ILC research
director's R&D Panel (Common Task Group) and of the executive board
of the International Large Detector (ILD)
concept - one of three collaborations developing full-detector designs for the
ILC.
- The Particle Data Group (PDG):
I am a co-author of the
Photon Detectors
section in PDG's
Review of
Particle Physics.
Research Scientist (after May 1997), Post-doctoral Research Associate
(till May 1997), State University of New York at Stony Brook. July 1995 - January 2001
As a reseach scientist, I contributed to the following tasks at DZero :
- Searches for charged Higgs boson in decays of the top quark:
I led these searches, which resulted in two publications based on the Run 1
data.
- Studies of the top quark:
For 4 years (1996-2000), I served first as a co-leader of a subgroup,
and later as a convenor of the top physics group at DZero.
I co-authored an invited article on the present status and future prospects
of top quark physics at the Tevatron, LHC, and ILC.
This article, titled Review of Top Quark Physics, was published in the 2003 issue of the
Annual Review of Nuclear and Particle Science.
- Detector alignment: I designed and implemented the infrastructure
for the offline program to calculate and correct misalignments of the entire
DZero detector.
During my post-doctoral appointment, I worked on the following projects:
- Run 2 Software: Offline software framework design and implementation.
- Forward Preshower Detector: Simulation, Technical Design Report.
- Run 1 Software: Calorimetry coordinator.
Post-doctoral Research Associate, University of Iowa. September 1994 - June 1995
This one-year appointment was focused on studies of electron-proton collisions
with the ZEUS detector at HERA (DESY).
Graduate Research Assistant, State University of New York at Stony Brook. August 1988 - September 1994
I conducted my thesis research under the direction of Prof. Roderich Engelmann.
The dissertation was titled Searches for ppbar -> ttbar at sqrt(s) = 1.8 TeV
using lepton+jets final states in the DZero detector.
The analysis exploited distinctive topological characteristics of the signal,
and led to the improvement of the lower limit for the mass of the top quark
from 91 GeV to 131 GeV.
The analysis techniques developed in the course of this research played a key
role in the discovery of the top quark in March, 1995.
I also contributed to the calorimeter reconstruction software and electron
identification, wrote the online monitoring software for the central drift
chamber (CDC) and had the primary responsibility for certifying its data
quality.
RESEARCH GRANTS
I have been a PI or Co-PI on the following research grants totaling
approximately $3,500,000:
- Searches for new phenomena at high-energy particle colliders
base grant for NIU's High Energy Physics program
(PI, NSF, FY2010-12),
- ientific Exchange Program between NIU and LPSC, Grenoble
(PI, CNRS/IN2P3 (the French Federal Agency for Scientific Research), FY2009),
- NIU-ANL Collaboration on ATLAS
(PI, Argonne National Laboratory, FY2010),
- Development of particle-flow algorithms for the ILC detector(s)
(Co-PI, DOE, FY2010-12),
- NIU-ANL Collaboration on ATLAS
(PI, Argonne National Laboratory, FY2009),
- QuarkNet at NIU
(PI, DOE (through Notre Dame University), FY2009),
- Searches for new phenomena at high-energy particle colliders
base grant for NIU's High Energy Physics program
(PI, NSF, FY2007-10),
- Development of particle-flow algorithms and simulation
software for the ILC detector(s)
(PI, DOE, FY2007),
- Design and prototyping of a scintillator-based hadron calorimeter
for the ILC detector(s)
(Co-PI, DOE, FY2007),
- Beam test of a scintillator-based tailcatcher/muon tracker for
ILC detector(s)
(Co-PI, DOE, FY2007).
- Development of particle-flow algorithms, simulation,
and other software for the LC detector
(PI, DOE, FY2006),
- Design and prototyping of a scintillator-based hadron calorimeter
for the ILC detector(s)
(Co-PI, DOE, FY2006),
- Development of particle-flow algorithms, simulation,
and other software for the LC detector
(PI, DOE, FY2005),
- Design and prototyping of a scintillator-based hadron calorimeter
for the ILC detector(s)
(Co-PI, DOE, FY2005),
- Development of extruded scintillator and tracking calorimetry
(PI, DOE Advanced Detector Research Program, FY2004-06),
- Searches for new phenomena at high-energy particle colliders
base grant for NIU's High Energy Physics program
(Co-PI, NSF, (FY2004-06),
- Design and prototyping of a scintillator-based digital
hadron calorimeter
(Co-PI, DOE, FY2004),
- Development of new hadronic calorimeter technology
(PI, DOE Advanced Detector Research Program, FY2003),
ACADEMIC HONORS
- President's merit list, Govt. of India, 1984.
- National merit scholarship, Govt. of India, 1982.
GRADUATE STUDENTS SUPERVISED
- Chad Suhr (Ph.D. in progress, Atlas),
- Robert Calkins (Ph.D. in progress, Atlas),
- Diego Menezes (Ph.D. in progress, D0),
- Mikhail Arov (Ph.D. completed, D0),
- Jeremy McCormick (MS completed, ILC).
POST-DOCS AND RESEARCH SCIENTISTS SPONSORED
- Victor Rykalin (2002-2004),
- Guilherme Lima (2003-present),
- Vishnu Zutshi (2003-present),
- Alexandre Dyshkant (2006-present).
SYNERGISTIC ACTIVITIES
- Coordinator, digitization validation, Atlas collaboration (2008-present);
- Coordinator, Tier0 software validation shifts, Atlas collaboration (2009-present);
- Co-leader,
Calorimetry working group of the American Linear Collider Physics Group
(2002-2007),
- Research Coordinator of Calorimetry, University Consortium for Linear
Collider Research and Development
UCLC, 2002-2003),
- Co-convenor, tau id group, DZero collaboration (2001-2005),
- Co-convenor, top physics group, DZero collaboration (1998-2000),
- Coordinator, calorimeter software, DZero collaboration (1995-1998).
OUTREACH
- I am the mentor of the NIU center of the federally funded
QuarkNet project, which counts more than
50 US research universities and national laboratories among its members.
Quarknet introduces high school students, through their teachers, to
High-energy physics.
Physics teachers and students from five local high schools participate in the
week-long annual institutes at NIU, where they interact with physicists from
NIU, ANL, and Fermilab; gain hands-on experience in assembling cosmic-ray
detectors from kits, and collect data with them, which they subsequently share
with fellow participants across the nation.
- Volunteer, Ask-a-scientist open-house program at Fermilab (since 2000).
COMMITTEE MEMBERHSIPS
- ILC research director's detector R&D Panel (Common Task Group),
- Executive board of the International Large Detector (ILD) collaboration,
- Fermilab Director's ILC-HEP task force,
- The US ILC detector R&D proposal coordination committee,
- Reviewer for NSF's Career grant proposals,
- Reviewer for DOE's Advanced Detector Research grant proposals,
- The NSF review panel for Information Technology Research,
- Several editorial boards and review committees at DZero, chaired some of them,
- General Education Committee of the Undergraduate Coordinating Council, NIU College of Liberal Arts and Sciences (2009-2012),
- Ph.D. dissertation completion award committee, NIU Graduate School (2007-2008),
- Undergraduate curriculum committee, NIU Physics Department (2005-present),
- Colloquium committee, NIU Physics Department (chair, 2005-2007).
OTHER MEMBERSHIPS
- Scientist, Northern Illinois Center for Accelerator and Detector Development/NICADD,
- Member, CAlorimetry for LInear Collider with Electrons collaboration,
- Member, American Physical Society,
- Visiting Scientist, Laboratoire de Physique Subatomique et de Cosmologie, Grenoble, France.
June 2008 - August 2009
- Guest scientist, Center for Particle Physics at Marseille, France (2004).
CONFERENCE ORGANIZATION
I have participated in the organization of several international conferences
and workshops either as a session convener, member of the local organizing
committee, or of the international advisory committee.
These include International Linear Collider workshops,
American Linear Collider workshops,
Weak Interactions and Neutrions,
IEEE Nuclear Science Symposium,
Calor,
Workshop on Hadronic Shower Simulation,
and
Charged Higgs workshops.
CONFERENCE TALKS (last 40)
- Top pair cross-section in the tau decay modes at Dzero,
3rd Top Workshop: from the Tevatron, Grenoble, France, Oct, 2008 (Invited).
- Summary of the "MSSM H+ -> SM particles" working group,
Charged Higgs Conference, Uppsala, Sweden, Sep, 2008 (Invited).
- CALICE Tail Catcher and Combined Analysis International Linear Collider Workshop,
(LCWS'07), Hamburg, Germany, May-June 2007.
- Electroweak Symmetry Breaking Summary,
21st International Workshop on Weak Interactions and Neutrinos, (WIN'07),
Kolkata, India, Jan, 2007 (Invited).
- Studies of the top quark at hadron colliders,
Workshop on Top Quark at the LHC, Grenoble, France, Oct, 2006 (Invited).
- Search for charged Higgs boson at DZero,
Charged Higgs Conference,, Uppsala, Sweden, Sep, 2006 (Invited).
- Particle-Flow Algorithm Development at NIU,
Linear Collider Workshop,
Vancouver, Canada, Jul, 2006.
- Scintillator Hadron Calorimeter R&D in America,
ibid.
- A Scintillator-based Hadron Calorimeter for the ILC Detector(s),
XII International Conference on Calorimetry in High Energy Physics (Calor06), Chicago, Illinois, Jun 2006.
- The case for a Scintillator-based Hadron Calorimeter for the SiD detector ,
ILC Physics and Detector Workshop (ALCPG2005), Snowmass, Colorado, Aug, 2005.
- Particle-Flow Algorithm Development at NIU,
ibid.
- Studies of silicon photodetectors for hadron calorimetry at the next electron-positron linear collider,
4th International Conference on New Developments in
Photodetection (Beaune'05), Beaune, France, Jun, 2005.
- Electroweak results from the Tevatron,
The 20th International Workshop on Weak Interactions and Neutrinos (WIN'05), Delphi, Greece, Jun, 2005.
- CALICE Tail-catcher/Muon Tracker Status and Plans,
ILC Workshop, Stanford, California, Mar, 2005.
- The Hadron Calorimeter: Analog or Digital?,
Workshop on ILC Detectors with Gaseous Tracking, (ILCD'05) Paris, France, Jan, 2005 (Invited).
- Toward Realistic Particle-Flow Algorithms,
ibid.
- Requirements for a worldwide ILC Detector Simulation Program,
The 3rd Linear Collider Simulation Workshop (LCSW'04), ANL, Illinois, Jun 2004.
- Summary of American ILC Calorimetry efforts,
The 4th International Conference on Linear Colliders, Paris, France, Apr, 2004.
- LCDG4: a GEANT4-based ILC detector simulation program,
ALCPG'04 Workshop Stanford, California, Jan, 2004.
- New results from the Tevatron,
The 6th workshop of the Asian Consortium for Future Accelerators, Mumbai, India. Dec, 2003 (Invited).
- Summary of American ILC Calorimetry efforts,
ibid.
- Calorimetry summary,
The 4th workshop of the American Linear Collider Physics Group, Cornell U., Jul, 2003 (Invited).
- Particle Flow Algorithms and Calorimetric Reconstruction,
The 2nd LC Detector Simulation Workshop (LCSW'03) Stanford, California, May, 2003.
- Status of the LC simulation software development,
The 3rd workshop of the American Linear Collider Physics Group, UT, Arlington, Jan, 2003.
- Summary of the American Calorimetry efforts,
The 3rd ECFA-DESY workshop on the ILC, Prague, Czech Republic. Nov, 2002.
- Calorimetry summary,
The 2nd workshop of the American Linear Collider Physics Group,
U of California, Santa Cruz, Jul, 2002.
- Latest top and W/Z results from the Tevatron,
XVIII Recontres de Moriond, Les Arcs, France, Mar, 2002.
- Workshop Summary,
The 1st LC Detector Simulation Workshop (LCDsoft) NIU, Illinois, Nov, 2002.
- Digital hadron calorimetry,
The 1st workshop of the American Linear Collider Physics Group, U. of Chicago, Jan, 2002.
- Top Quark pair production cross section at Tevatron,
Thinkshop2, Fermilab, Illinois, Nov, 2000 (Invited).
- Particle Identification at DZero using Neural Networks,
VII International Workshop on Advanced Computing and Analysis Techniques in Physics Research (ACAT
2000), Fermilab, Batavia, Illinois, Oct, 2000.
- Studies of the top quark at DZero,
30th International Conference on High Energy Physics, Osaka, Japan, Jul-Aug, 2000.
- Search for charged Higgs in the decay of top quark pairs at the Tevatron,
SUSY99, Fermilab, Batavia, Illinois, Jun, 1999.
- Charged Higgs and spin correlations in ppbar -> ttbar,
XIII symposium on Hadron Collider Physics, Mumbai, India, Jan, 1999.
- New results from the Tevatron,
X symposium on High Energy Physics Chandigarh, India, Dec, 1998 (Invited).
- Search for a charged Higgs boson in the decay of top quark pairs,
Joint Theoretical and Experimental Seminar, Fermilab, Illinois, USA, Dec, 1998.
- Measurements of top quark production cross section and mass at DZero,
DESY seminar, Hamburg, Germany, Jun, 1997.
- Top quark: new results from the Tevatron,
Beyond Standard Model V, Balholm, Norway, May, 1997.
- Measurement of top production cross section at DZero,
XI symposium on Hadron Collider Physics, Padova, Italy, Jun, 1996.
- Top Physics at the Tevatron,
4th workshop on High Energy Physics Phenomenology, Calcutta, India, Jan, 1996.
In addition, I have given seminars and colloquia at many universities
and research laboratories in Asia, Europe and the USA. These include
the Austrian Academy of Sciences, Calcutta U., Cambridge U., U.
Copenhagen, DESY (Hamburg and Zeuthen centers), Fermilab, U. Helsinki,
Imperial college, Indian Institute of Technology (Kharagpur and Mumbai
centers), U. Iowa, Jadavpur U., Kansas State U., LAPP (Annecy), LMU
Munich, MIT, Oxford U., U. Rochester, Saha Institute of Nuclear
Physics, Seoul National University, Tata Institute of Fundamental
Research, U. Tokyo, University College London, Uppsala U.,
Vishva-Bharati U.
PUBLICATIONS
Here is a list of my publications in refereed journals of physics.
REFERENCES
Available on request.