About Me

I am an experimental particle physicist and joined the physics faculty at Indian Institute of Science Education and Research, Pune in April 2014. Just before joining the IISER, I was a postdoctoral research associate at Fermi Nationation Accelerator Laboratory (Fermilab) working on CMS experiment at CERN, Geneva. I did my PhD from Tata Institute of Fundamental Research (TIFR), Mumbai. My undergraduate studies were completed in University of Rajasthan, Jaipur. I grew up in a small town in Rajasthan, called Kankroli (Rajsamand) where I also completed my school education.

Research

For students:

2022: I will be taking PhD and iPhD students admitting in Aug 2022 batch.
Please contact me over mail to get pointers on our recent research activities or meet me in person. This page hasn't been updated for some time.

I am not taking any semester project students for next semester.

My research interests revolve around understanding the identity and nature of fundamental constituents of the universe. I study proton proton collisions at high energies (13 TeV at present) delivered by Large Hadron Collider (LHC), outcome of which are recorded by the CMS detector. Presently my research interests are focussed on searching for new particles and their interactions predicted by a theory of elementary particles, called Supersymmetry (SUSY). The SUSY has been theoretically the most appealing extension of the standard model of particles. This has been suggested over five decades, to address several theoretical lacunae of the SM as well as cosmic observational puzzles such as the dark matter.

The complex nature of the high energy physics experiments requires a lot of research to get ready the giant detectors (which for example have a few million electronic channels) for their use to measure properties of hundreds of particles produced every few nanoseconds, in the collisions at the LHC. The information is then used to decode the secrets of laws of nature. The responsibilities of performing these crucial tasks are assigned to smaller subgroups. At present, my group is responsible for providing calibration of particle flow hadrons, and involved in software release validation of hadron calorimeter, and improving fast parametrization of hadronic showers in calorimeters.

Recent projects in CMS

• Co-convener of CMS Supersymmetry physics analysis group (SUSY PAG) (Sep 2018-present)
• Co-convener of CMS jets & MET physics object group (JME POG) (Sep 2016-Aug 2018)
• Searching for SUSY in photons + (b) jets + MET final state
• Searching for new physics using multijets and MHT
• Co-convener of performance studies subgroup of HCAL DPG (Jan 2016-Jul 2016)
• Co-convener of inclusive searches for supersymmetry at CMS (SUS PAG) (Jan 2014-Dec 2015)
• Searching for scalar top pair production in all hadronic final state

More details about my ongoing and past projects, and those with graduate and undergraduate students at IISER-Pune will be made available soon.

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Teaching

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Professional Service

• Co-organized CMS Workshop - Supersymmetry in LHC Run II, Technische Universität Wien, Vienna, Jun 13-15, 2018
• Organized 2nd Workshop of the Indo-French Network in High Energy Physics (LIA THEP and CEFIPRA INFRE-HEPNET), IISER, Pune, Feb 25-28, 2018
• Organized the first Joint Astro & Particle Physics meeting, IISER, Pune, Feb 24, 2018
• Member of national organizing committee for 25th International Conference on Supersymmetry and the Unification of Fundamental Interactions (SUSY17) , TIFR, Mumbai, Dec 11-14, 2017
• National contact for Indian participating teams for BEAMLINE FOR SCHOOLS competition powered by CERN, 2017-present
• Co-organized Candles of Darkness , Dark Matter and the Search for Physics Beyond the Standard Model, ICTS, Bangalore, Jun 05-09, 2017
• Organized Hands-on Advanced Tutorial Sessions for MET at CMS, LPC/Fermilab, Jun 15, 2017.
• Co-organized CMS JetMET workshop: Physics at 100/fb at University of Helsinki, Helsinki, May 10-12, 2017
• Co-organized SUSY sessions for The Fifth Annual Large Hadron Collider Physics (LHCP2017) , Shanghai, May 15-20, 2017
• Co-organized Jets@LHC Workshop at International Centre for Theoretical Science (ICTS), Bangalore, Jan 21-28, 2017
• Organized and convened BSM parallel sessios for 38th International Conference in High Energy Physics (ICHEP) , Chicago, Aug 03-10, 2016
• Member of CMS diversity study group, Jun 2016-Jun 2017
• Organizer for SM and BSM physics working group at Workshop in High Energy Physics Phenomenology (WHEPP) , IIT Kanpur, Dec 04-10, 2015
• Member of committee for internet infrastructure at IISER, Pune, Jun 2014-Nov 2017
• Statistical methods in HEP (Guest lecturer), SERC School, BITS-Pilani, Hyderabad Campus, Hyderabad, Jun 02-28, 2014
• Organized SUSY at the Near Energy Frontier workshop at Fermilab, Nov 11-13, 2013
• Member of Events Organising Committee at LHC Physics Centre (LPC), Fermilab, 2013-2014
• Instructor for all hadronic SUSY exercises in Data Analysis Schools at LPC, Fermilab in 2012 and 2013
• Jets object contact for CMS SUSY physics analysis group (Jan 2012 - Dec 2014)

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Conference and Invited Talks

• From big data to fundamental constituents of universe ! Chasing new physics at the LHC - Higgs, Dark Matter & more , SCIENCE to the Doorsteps of TECHNOCRATS, Pune (India), November 15, 2018 (slides) (recording)
• SUSY Searches with jets and MET at CMS Experiment , Institute of High Energy Physics (HEPHY), Vienna (Austria), Jun 12, 2018
• CMS Status Report in LHC Experiments Committee (LHCC) Open Session, CERN, Geneva (Switzerland), May 30, 2018
• Fundamental constituents of the universe around us, Modern College of Arts, Science and Commerce, Pune (India), January 7, 2017
• Recent Physics Results from CMS Experiment (IndiaCMS Highlights), DAE-DST Task Force at BARC, Mumbai, Sep 02, 2016
• Searching for Supersymmetry in 13 TeV proton proton collisions at the LHC, Free Meson Seminar, TIFR, Mumbai, March 2016
• Searching Supersymmetry at the CMS experiment, HEP Seminar, Physics Research Laboratory (PRL), Ahmedabad, April 03, 2014
• Review of Kinematic Variables used in SUSY Searches at CMS, Kinematic Variables for New Physics, Caltech (USA), Oct 4-6, 2013
• Search for SuperSymmetry with Jets & Missing Transverse Momentum at CMS, Physics Seminar, IISER, Pune (India), Jun 10, 2013
• Energy Frontier at the LHC : Review of New Physics Searches, Physics plenary at XXI International Workshop on Deep-Inelastic Scattering and Related Subjects, Marsielle (France), April 22-26, 2013, M
• Searching Supersymmetry with Jets & MET at CMS Experiment, HEP Seminar at Northwestern University, Evanston (USA), February 4, 2013
• Review of New Physics Searches at LHC, XX DAE-BRNS High Energy Physics Symposium, Visva-Bharati, Santiniketan (India), January 13-18, 2013 (India)
• Searches for SUSY in hadronic states at CMS, 19th International Conference on Supersymmetry and Unification of Fundamental Interactions (SUSY2011), Fermilab (USA), Aug 28-Sep 02, 2011
• Search for new physics with jets and MET at CMS, HEP seminar, TIFR (Mumbai), May 10, 2011
• Validation of Geant4 Physics Models with LHC Collision Data, Nuclear Science Symposium, Medical Imaging conference and RTDS workshop, Knoxville, TN (USA), Oct 30 - Nov 06, 2010
• Validation of Simulation of Hadronic Shower Simulation using LHC Collision Data, Nuclear Science Symposium, Medical Imaging conference and RTDS workshop, Knoxville, TN (USA), Oct 30 - Nov 06, 2010
• Performance of CMS Calorimeters in 2006 Test beam data, Experimental HEP Journal club, Northwestern University, Evanston (USA), April 2008
• Calibration of CMS Outer Hadron Calorimeter with Muons, DAE SYMPOSIUM of High Energy Physics, IIT, Kharagpur (India), December 11-16, 2006
• Hadron Energy Resolution with the CMS Calorimeter Prototype, DAE SYMPOSIUM of High Energy Physics, IIT, Kharagpur (India), December 11-16, 2006
• Understanding the Performance of CMS Calorimeter using TestBeam 2004 data, Linear Collider Workshop (LCWS06) IISc Bangalore (India), March 09-13, 2006
• Performance of CMS Calorimeter in TestBeam 2004, DAE SYMPOSIUM of High Energy Physics, Saha Institute of Nuclear Physics, Kolkata (India), Nov 29-Dec 3, 2004

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Publications

A complete list of my publications is available in INSPIRE. The CMS journal publications and detector performance summaries where I made direct personal contributions are summarized in the following.

Recent publications

• CMS Collaboration, "Search for supersymmetry in events with a photon, jets, and missing transverse momentum in proton-proton collisions at 13 TeV", CMS-PAS-SUS-18-002
• CMS Collaboration, "Performance of missing transverse momentum in proton-proton collisions at 13 TeV using the CMS detector", CMS-PAS-JME-17-001
• CMS Collaboration, "Search for supersymmetry in the multijet and missing transverse momentum channel in pp collisions at 13 TeV", Phys. Rev. D 96, 032003 (2017), arXiv:1704.07781
• CMS Collaboration, "Search for supersymmetry in the all-hadronic final state using top quark tagging in pp collisions at sqrt(s) =13 TeV", Phys. Rev. D 96 (2017) 012004, arXiv:1701.01954
• CMS Collaboration,"Search for supersymmetry in the multijet and missing transverse momentum channel in pp collisions at 13 TeV", Phys. Lett. B 758 (2016) 152, arXiv:1602.06581
• CMS Collaboration,"Searches for third generation squark production in fully hadronic final states in proton-proton collisions at sqrt(s)=8 TeV'', JHEP 1506 (2015) 116, arXiv:1503.08037
• CMS Collaboration, "Searches for supersymmetry based on events with b jets and four W bosons in pp collisions at 8 TeV, Phys. Lett. B 745 (2015) 5, arXiv:1412.4109
• CMS Collaboration, "Search for New Physics in Multijets and Missing Momentum Final State in Proton-Proton Collisions at sqrt(s)=8 TeV", JHEP 06 (2014) 055, arXiv:1402.4770
• CMS Collaboration, "Search for New Physics in the Multijets and Missing Transverse Energy in 7 TeV proton proton collisions", Phys. Rev. Lett. 109 (2012) 171803, arXiv:1207.1898
• CMS Collaboration, "Search for New Physics with Jets and Missing Transverse Momentum in pp collisions at sqrt(s) = 7 TeV", JHEP 1108 (2011) 155, arXiv:1106.4503
• CMS Collaboration, "Determination of Jet Energy Calibration and Transverse Momentum Resolution in CMS", JINST 6 (2011) 11002, arXiv:1107.4277
• S. Abdullin et al. "The CMS barrel calorimeter response to particle beams from 2 to 350 GeV/c", Eur. Phys. J. C 60 (2009), 359-373
• S. Abdullin et al. "Design, performance, and calibration of the CMS Hadron-outer calorimeter", Eur.Phys.J. C57 (2008), 653-663
• S. Sharma, "Understanding the performance of CMS calorimeter", Pramana 69 (2007), 1069-1074

Detector Perfomance Reports

• CMS Collaboration, "Calorimetry Task Force Report on Extraction of Single Particle Response", CMS DN-2012/002
• CMS Collaboration, "Comparison of Single Particle Response in Data and MC at 7 TeV", CMS DN-2012/001
• CMS Collaboration, "Single-Particle Response in the CMS Calorimeters", CMS-PAS-JME-10-008
• CMS Collaboration, "Jets in 0.9 and 2.36 TeV pp Collisions", CMS-PAS-JME-10-001
• S. Abdullin et al, "Calorimetry Task Force Report", CERN-CMS-NOTE-2010-007
• S. Abdullin et al, "Calorimetry Task Force Report", CMS-NOTE-2008-025
• S. Abdullin et al, "Design, performance, and calibration of CMS hadron endcap calorimeters", CERN-CMS-NOTE-2008-010
• S. Abdullin et al, "Energy Response and Longitudinal Shower Profiles Measured in CMS HCAL and Comparison With Geant4", CERN-CMS-NOTE-2006-143
• B.S. Acharya et al, "The CMS Outer Hadron Calorimeter", CMS NOTE-2006/127
• CMS HCAL Collaboration, "Design, Performance and Calibration of the CMS Forward Calorimeter Wedges", CMS-NOTE-2006-044

Others

• P. Atmasiddha, S. Bien, S. Sharma, "MadAnalysis5: Implementation of CMS-SUS-14-001-TopTag", (2015), doi: 10.7484/INSPIREHEP.DATA.AL3X.K2SD, Validation Note
• S. Pandey, S. Sharma, "MadAnalysis5: Implementation of CMS-SUS-14-001 (monojet anaysis)", (2015), doi: 10.7484/INSPIREHEP.DATA.QGBP.K237, Validation Note
• S. Sharma et al, "Asymmetry in Nature - Discrete symmetries in particle physics and their violation", Resonance (2002)7:10
• S. Sharma et al, "How is Nature Assymetric - Discrete symmetries in particle physics and their violation", Resonance (2002) 7:45

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Fellowships, Awards and research grants

• CMS LHC Physics Center (LPC) Distinguished Researcher (Senior) , 2017
• CMS LHC Physics Centre (LPC) Distinguished Researcher (Junior) , 2012 & 2013
• Qualified University Grants Commission (UGC) and Council of Scientic and Industrial Research (CSIR) award for Junior Research Fellowships (JRF) and eligibility for Lectureship in Physical Sciences in Indian universities and colleges (July 2001)
• Received TIFR Alumni Association Scholarship for career development supported by TIFR endowment fund (2002-2005)

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