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Name : Sourov Roy

Department : School of Physical Sciences
Designation : Senior Professor
Contact : +91 33 2473 4971 (Ext:2290)
Email : tpsr@iacs.res.in


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Physics beyond the Standard Model, in particular, phenomenology of supersymmetric theories. Higgs physics, Collider Physics. Neutrino masses and mixing. Physics of particle dark matter. Photon-axion mixing. Models of warm dark matter and X-ray observations.


Academic Profile

Academic Profile

Education/Position:

1. Ph.D in Theoretical High Energy Physics (1999) from Harish-Chandra Research Institute
(HRI), Allahabad
2. Visiting Fellow, Tata Institute of Fundamental Research (TIFR), Mumbai, 1999-2001
3. Post-doctoral Fellow, Technion-Israel Institute of Technology, Israel, 2001-2003
4. Scientist, Helsinki Institute of Physics, Finland, 2003-2006
5. Associate Professor, IACS, Kolkata, 2006-2011
6. Professor, IACS, Kolkata, 2011 - 2016
7. Senior Professor, IACS, Kolkata, September 2016 - present


Group

Pratick Sarkar

Ph.D student (Senior Research Fellow)
M.Sc (Physics), North Bengal University
Theoretical Particle Physics
C-403 Centenary Building
spsps2523@iacs.res.in +91-33-2473 4971 (Extn. 2298)
Tanmoy Kumar

Ph.D student (Senior Research Fellow)
M.Sc (Physics), IACS
Theoretical Particle Physics
C-426(I) Centenary Building
kumartanmoy1998@gmail.com
+91-33-2473 4971 (Extn. 2293)
Ananya Tapadar

Ph.D student (Senior Research Fellow)
M.Sc (Physics), IACS
Theoretical Particle Physics
C-401 Centenary Building
intat@iacs.res.in
+91-33-2473 4971 (Extn. 2297)
Shihabul Haque

BS-MS Project Student
School of Physical Sciences, IACS
shihabul1312@gmail.com
Suvendu Giri

Integrated M.Sc-Ph.D Project Student
School of Physical Sciences, IACS
sonusantu59@gmail.com

 


Publication

Exploring axions through the photon ring of a spherically symmetric black hole,
Sourov Roy, Pratick Sarkar, Subhadip Sau, Soumitra SenGupta, J. Cosmology and Astroparticle Phys. 11 (2023) 099.

Searching for relativistic axions in the sky,
Arpan Kar, Tanmoy Kumar, Sourov Roy, Jure Zupan, J. Cosmology and Astroparticle Phys. 08 (2023) 056.

Electroweak phase transition in a right-handed neutrino superfield extended NMSSM,
Pankaj Borah, Pradipta Ghosh, Sourov Roy and Abhijit Kumar Saha, J. High Energy Phys. 08 (2023) 029.

Secluded dark sector and muon (g-2) in the light of fast expanding Universe,
Sougata Ganguly, Sourov Roy and Ananya Tapadar, J. Cosmology and Astroparticle Phys. 02 (2023) 044.

Baryon asymmetry and lower bound on right handed neutrino mass in fast expanding Universe: an analytical approach,
Mainak Chakraborty and Sourov Roy, J. Cosmology and Astroparticle Phys. 11 (2022) 053.

Imprints of MeV scale hidden dark sector at Planck Data,
Sougata Ganguly, Sourov Roy and Abhijit Kumar Saha, Phys. Lett. B834 (2022) 137463.

Non-adiabatic evolution of dark sector in the presence of U(1)_(Lmu-Ltau) gauge symmetry,
Ananya Tapadar, Sougata Ganguly and Sourov Roy, J. Cosmology and Astroparticle Phys. 05 (2022) 019.

Probing Lmu-Ltau models with CE\nuNS: A new look at the combined COHERENT CsI and Ar data,
Heerak Banerjee, Bhaskar Dutta and Sourov Roy, Phys. Rev. D104, 015015 (2021).

When Freeze-out occurs due to a non-Boltzmann suppression: A study of degenerate dark sector,
Anirban Biswas, Sougata Ganguly and Sourov Roy, J. High Energy Phys. 06 (2021) 108.

Supersymmetric gauged U(1)_(Lmu-Ltau) model for electron and muon (g-2) anomaly,
Heerak Banerjee, Bhaskar Dutta and Sourov Roy, J. High Energy Phys. 03 (2021) 211.

Fermionic dark matter via UV and IR freeze-in and its possible x-ray signature,
Anirban Biswas, Sougata Ganguly and Sourov Roy, J. Cosmology and Astroparticle Phys. 03 (2020) 043.

Signatures of supersymmetry and a Lmu - Ltau gauge boson at Belle-II,
Heerak Banerjee and Sourov Roy, Phys. Rev. D99, 035035 (2019).

Supersymmetric gauged U(1)_(Lmu - Ltau) model for neutrinos and muon (g-2) anomlay,
Heerak Banerjee, Pritibhajan Byakti and Sourov Roy, Phys. Rev. D98, 075022 (2018).

Generation of radiative neutrino mass in the linear seesaw framework, charged lepton flavor violation and dark matter,
Arindam Das, Takaaki Nomura, Hiroshi Okada and Sourov Roy, Phys. Rev. D96, 075001 (2017).

Light top squarks in U(1)_R-lepton number model with a right handed neutrino and the LHC,
Sabyasachi Chakraborty, AseshKrishna Datta, Katri Huitu, Sourov Roy and Harri Waltari, Phys. Rev. D93, 075005 (2016).

Stability constraints in triplet extension of MSSM,
Moumita Das, Stefano Di Chiara and Sourov Roy, Phys. Rev. D91, 055013 (2015).

h -> γγ in U(1)_R-lepton number model with a right handed neutrino,
Sabyasachi Chakraborty, AseshKrishna Datta and Sourov Roy, J. High Energy Phys. 1502, (2015) 124; Erratum: J. High Energy Phys. 1509, (2015) 077.

7 keV sterile neutrino dark matter in U(1)_R-lepton number model,

Sabyasachi Chakraborty, Dilip Kumar Ghosh and Sourov Roy, J. High Energy Phys. 1410, (2014) 146.

Higgs boson mass, neutrino masses and mixing and keV dark matter in an U(1)_R -lepton number model,

Sabyasachi Chakraborty and Sourov Roy, J. High Energy Phys. 1401, (2014) 101.

Vaccum stability constraints on the minimal singlet TeV seesaw model,

Subrata Khan, Srubabati Goswami and Sourov Roy, Phys. Rev. D89, 073021 (2014).

Invisible Higgs decay in a supersymmetric inverse seesaw model with light sneutrino dark matter,

Shankha Banerjee, P.S. Bhupal Dev, Subhadeep Mondal, Biswarup Mukhopadhyaya and Sourov Roy, J. High Energy Phys. 1310, (2013) 221.

Phenomenology of light sneutrino dark matter in cMSSM/mSUGRA with inverse seesaw,

P.S. Bhupal Dev, Subhadeep Mondal, Biswarup Mukhopadhyaya and Sourov Roy, J. High Energy Phys. 1209, (2012) 110.

Muon (g-2) from the bulk neutrino field in a warped extra dimensional model,

R.S. Hundi, Sourov Roy and Soumitra SenGupta, Phys. Rev. D86, 036014 (2012).

Four lepton flavor violating signals at the LHC,

Dilip Kumar Ghosh, Probir Roy and Sourov Roy, J. High Energy Phys. 1205, (2012) 067.

Non-standard interaction in neutrino oscillations and recent Daya Bay, T2K experiments,

Rathin Adhikari, Sabyasachi Chakraborty, Arnab Dasgupta and Sourov Roy, Phys. ReV. D86, 073010 (2012).

Exploring novel correlations in trilepton channels at the LHC for the minimal supersymmetric inverse seesaw model,

Subhadeep Mondal, Sanjoy Biswas, Pradipta Ghosh and Sourov Roy, J. High Energy Phys. 1205, (2012) 042.

Constraints on axino warm dark matter from X-ray observation at the Chandra telescope and SPI,

Paramita Dey, Biswarup Mukhopadhyaya, Sourov Roy and Sudhir K. Vempati, J. Cosmology and Astroparticle Phys. 1205, (2012) 042.

Resonant leptogenesis with nonholomorphic R-parity violation and LHC phenomenology,

Joydeep Chakraborty and Sourov Roy, Phys. ReV. D85, 035014 (2012).

R parity violating supersymmetric explanation for the CDF Wjj excess,

Dilip Kumar Ghosh, Manas Maity and Sourov Roy, Phys. ReV. D84, 035022 (2011).

Sneutrino-antisneutrino oscillation at the Tevatron,

Dilip Kumar Ghosh, Tuomas Honkavaara, Katri Huitu and Sourov Roy, Phys. ReV. D84, 075001 (2011).

Constraints on composite Dirac neutrinos from observations of galaxy clusters,

R.S. Hundi and Sourov Roy, Phys. Lett. B702, (2011)228.

Unusual Higgs boson signal in R-parity violating nonminimal supersymmetric models at the LHC,

Priyotosh Bandyopadhyay, Pradipta Ghosh and Sourov Roy, Phys. ReV. D84, 115022 (2011).

Multi-photon signal in supersymmetry comprising non-pointing photon(s) at the LHC,

Sanjoy Biswas, Joydeep Chakraborty and Sourov Roy, Phys. ReV. D83, 075009 (2011).

Ultrarelativistic sneutrinos at the LHC and sneutrino-antisneutrino oscillation,

Dilip Kumar Ghosh, Tuomas Honkavaara, Katri Huitu and Sourov Roy, Phys. ReV. D82, 115006 (2010).

One-loop contribution to the neutrino mass matrix in NMSSM with right-handed neutrinos and tri-bimaximal mixing,

Debottam Das and Sourov Roy, Phys. ReV. D82, 035002 (2010).

Radiative contribution to neutrino masses and mixing in μνSSM,

Pradipta Ghosh, Paramita Dey, Biswarup Mukhopadhyaya and Sourov Roy, J. High Energy Phys. 1005, (2010) 087.

Neutrino masses and mixing, lightest neutralino decays and a solution to the mu problem in supersymmetry,

Pradipta Ghosh and Sourov Roy, J. High Energy Phys. 0904, (2009) 069.

Correlations between sneutrino oscillations and signatures at the LHC in anomaly-mediated supersymmetry breaking,

Dilip Kumar Ghosh, Tuomas Honkavaara, Katri Huitu and Sourov Roy, Phys. ReV. D79, 055005 (2009).

Search for Higgs bosons in SUSY cascades in CMS and Dark matter with non-universal gaugino Masses,

Katri Huitu, Ritva Kinnunen, Jari Laamanen, Sami Lehti, Sourov Roy, Tapio Salminen, Eur. Phys. J. C58, (2008) 591.

Constraining the Randall-Sundrum modulus in the light of recent PVLAS data,

Debaprasad Maity, Sourov Roy and Soumitra SenGupta, Phys. ReV. D77, 015010 (2008).

Lepton flavour violation in future linear colliders in the long-lived stau NLSP scenario,

Alejandro Ibarra and Sourov Roy, J. High Energy Phys. 05, (2007) 059.

Photon propagation in magnetic and electric fields with scalar/pseudoscalar couplings: A New look,

Emidio Gabrielli, Katri Huitu, and Sourov Roy, Phys. Rev. D74, 073002 (2006).

Signals of sneutrino-antisneutrino mixing in an e- gamma collider in anomaly-mediated supersymmetry breaking,

Tuomas Honkavaara, Katri Huitu, and Sourov Roy, Phys. Rev. D73, 055011 (2006).

Phenomenology of non-universal gaugino masses in supersymmetric grand unified theories,

Katri Huitu, Jari Laamanen, Pran N. Pandita, and Sourov Roy, Phys. Rev. D72, 055013 (2005).

Infrared fixed point of the top Yukawa coupling in split supersymmetry,

Katri Huitu, Jari Laamanen, Probir Roy, and Sourov Roy, Phys. Rev. D72, 055002 (2005).

Higher dimensional models of light Majorana neutrinos confronted by data,

JoAnne L. Hewett, Probir Roy, and Sourov Roy, Phys. Rev. D70 (Rapid Communication), 051903 (2004).

Anomaly mediated supersymmetry breaking and its test in linear colliders,

Sourov Roy, Mod. Phys. Lett. A19 (2004) 83.

Single sneutrino production at hadron colliders,

Masud Chaichian, Anindya Datta, Katri Huitu, Sourov Roy and Zenghui Yu, Phys. Lett. B594, (2004) 355.

Light GUT triplets and Yukawa Splitting,

Subhendu Rakshit, Guy Raz, Sourov Roy, and Yael Shadmi, Phys. Rev. D69, 095006 (2004).

Effective R-parity violation from supersymmetry breaking,

Shaouly Bar-Shalom and Sourov Roy, Phys. Rev. D69, 075004 (2004).

Signals of anomaly mediated supersymmetry breaking in an e- gamma collider,

Debajyoti Choudhury, Dilip Kumar Ghosh, and Sourov Roy, Nucl. Phys. B646, (2002)3.

Effects of initial axion production and photon-axion oscillation on type Ia supernova dimming,

Yuval Grossman, Sourov Roy, and Jure Zupan, Phys. Lett. B543, (2002)23.

Gauged L_mu - L_tau with Large Muon Anomalous Magnetic Moment and the Bimaximal Mixing of Neutrinos,

Ernest Ma, D.P. Roy, and Sourov Roy, Phys. Lett. B525, (2002)101.

Vacuum stability bounds in anomaly and gaugino mediated SUSY breaking models,

Emidio Gabrielli, Katri Huitu, and Sourov Roy, Phys. Rev. D65, 075005 (2002).

Single sneutrino production in gamma-gamma collisions,

Masud Chaichian, Katri Huitu, Sourov Roy, and Zenghui Yu, Phys. Lett. B518 (2001)261.

Characteristic Wino signals in a linear collider from anomaly mediated supersymmetry breaking,

Dilip Kumar Ghosh, Anirban Kundu, Probir Roy, and Sourov Roy, Phys. Rev. D64, 115001 (2001).

Constraining Anomaly Mediated Supersymmetry Breaking Framework via Ongoing Muon g - 2 Experiment at Brookhaven,

Utpal Chattopadhyay, Dilip Kumar Ghosh, and Sourov Roy, Phys. Rev. D62, 115001 (2000).

Linear Collider Signal of a Wino LSP in Anomaly Mediated Scenarios,

Dilip Kumar Ghosh, Probir Roy, and Sourov Roy, J. High Energy Phys.08, (2000) 031.

Study of R-parity-violating Supersymmetric Signals at an e-e- collider,

Dilip Kumar Ghosh and Sourov Roy, Phys. Rev. D63, 055005 (2001).

Constraining an R-parity violating supersymmetric theory from the SuperKamiokande data on atmospheric neutrinos,

Aseshkrishna Datta, Biswarup Mukhopadhyaya, and Sourov Roy, Phys. Rev. D61, 055006 (2000).

Radiative decay of the lightest neutralino in an R-parity violating supersymmetric theory,

Biswarup Mukhopadhyaya and Sourov Roy, Phys. Rev. D60, 115012 (1999).

Correlations between neutrino oscillations and collider signals of supersymmetry in an R-parity violating model,

Biswarup Mukhopadhyaya, Sourov Roy, and Francesco Vissani, Phys. Lett. B443, (1998) 191.

Filtering out signals of gauge-mediated supersymmetry breaking: Can we always eliminate conventional supersymmetric effects ?,

Biswarup Mukhopadhyaya and Sourov Roy, Phys. Rev. D57, 6793 (1998).

Testing gauge-gravitino coupling in gauge-mediated supersymmetry breaking through single photon events,

Amitava Datta, Aseshkrishna Datta, Anirban Kundu, Biswarup Mukhopadhyaya, and Sourov Roy, Phys. Lett. B416, (1998) 117.

Some implications of a supersymmetric model with R-parity breaking bilinear interactions,

Sourov Roy and Biswarup Mukhopadhyaya, Phys. Rev. D55, 7020 (1997).
 


Teaching

  • "Mathematical Methods-II" (PHS-4202) taught at the IACS Integrated M.Sc-Ph.D programme in Physical Sciences (2017, 2018, 2019,2020,2021,2022,2023)
  • “Particle Physics and the Standard Model” taught at the IACS Ph.D program (2007-08, 2009, 2011)
  • “Uncovering the origin of neutrino masses” APS-IUSSTF Professorship Lectures (three lectures) at the University of Cincinnati, USA (April 2019)
  • “Particle Physics and the Standard Model”, Twelve lecture course at the Preparatory SERC School in Theoretical High  Energy Physics’, BITS-Pilani, K.K. Birla Goa Campus (October-November 2010)
  •  Taught Particle Physics for the school leaving students in the IACS Summer School on Basic Sciences.
  • “Supersymmetric Theories and High Scale Physics”, invited talk at the 17th DAE-BRNS High Energy Physics Symposium, IIT-Kharagpur, 2006
  • “Light gravitinos at the LHC and implications for cosmology”, invited talk at the International Workshop on ‘Dark Matter in LHC era: Direct and Indirect Searches’, SINP, Kolkata, 2011
  • “Supersymmetry, neutrino mass and the LHC”, “Special Universe Lecture” at The Excellence Cluster “Origin and Structure of the Universe”, Munich, Germany, 2012
  • “SUSY Inverse Seesaw and its implications at the LHC”, Invited talk at the “2nd KIAS Phenomenology Workshop”, Korea Institute for Advanced Study (KIAS), Seoul, Korea, 2012
  • “Photon-axion mixing”, Invited overview talk at “Sangam@HRI:Instructional Workshop in Particle Physics”, HRI, Allahabad, 2013
  • “Supersymmetry with R-symmetry: Neutrinos, Higgs boson and dark matter”, Theoretical Physics Colloquium, TIFR, Mumbai, November 03, 2015


Project Students Alumni

Pradipta Ghosh

Assistant Professor
Department of Physics
Indian Institute of Technology, Delhi
tphyspg@physics.iitd.ac.in
Subhadeep Mondal

Assistant Professor
Bennett University, Greater Noida, India subhadeep.mondal@bennett.edu.in
Sabyasachi Chakraborty

Assistant Professor,
Indian Institute of Technology (IIT) Kanpur
Kanpur 208016, India
sabyac@iitk.ac.in
Heerak Banerjee

Post-doctoral Fellow
Technical University of Munich
D-85748 Garching, Germany
heerak.banerjee@tum.de
Sougata Ganguly

Post-doctoral Fellow
Department of Physics and Institute of Quantum Systems (IQS)
Chungnam National University
Daejeon, Korea
sganguly@cnu.ac.kr
Pritibhajan Byakti (Former PDF)

Assistant Professor & HoD
Department of Physics
Pt. D. Upadhyaya Adarsha Mahavidyalaya,
Eraligool, Karimganj-788723, Assam
priti137@gmail.com
Anirban Biswas (Former PDF)

Assistant Professor
Department of Applied Science
Haldia Institute of Technology
Haldia, West Bengal, India
anirban.biswas.sinp@gmail.com
Mainak Chakraborty (Former NPDF)

Assistant Professor
Department of Science
Sukanta Mahavidyalaya
Dhupguri, West Bengal, India
mainak.chakraborty2@gmail.com
Arpan Kar (Former PDF)

Post-doctoral Fellow
Sogang University Seoul, Korea arpankarphys@gmail.com
Abhijit Kumar Saha (Former NPDF)

Post-doctoral Fellow
Institute of Physics, Bhubaneswar abhijitsaha118@gmail.com
Arnab Paul (Former PDF)

CEFIPRA (Indo-French)Post-doctoral Fellow
Indian Institute of Technology Madras
arnabpaul9292@gmail.com
Sohini Pal

Ph.D Student
Department of Physics, University of Cincinnati, USA
sohinipal2001@gmail.com
Rupsa De

Ph.D Student
Department of Physics, University of Illinois Urbana-Champaign, USA
rupsamonde@gmail.com
Tanushree Bhattacharya

MS Student
Weizmann Institute of Science, Israel
tanushreebhattacharya65@gmail.com

 


Honors/Awards

  • APS-IUSSTF Professorship Award - 2018
  • Visiting Scientist, Cluster of Excellence, Munich Technical University, Germany (June 2012)
  • Awarded Lady Davis Post-doctoral Fellowship at the Technion-Israel Institute of Technology (2002-2003)
  • University Gold Medal, M.Sc (Physics), Burdwan University (1993)