## High Energy Physics

High Energy Physics Theory and Phenomenology group is involved in cutting edge research spanning a wide range: Higgs physics, flavour physics, collider phenomenology, dark matter, cosmology, supersymmetry, neutrino physics, effective field theory, nuclear physics etc. It is undoubtedly one of the largest groups of its kind in India with high level of regular activities like journal club meetings, talks/seminars, topical meetings/ conferences, collaborations within the group and outside with an impressive publication graph; which is strengthening day by day.

The experimental High Energy Physics group is currently working on the Belle and Belle II experiments at KEK in Japan, the Nova and the Deep Underground Neutrino Experiment (DUNE) at Fermi Lab, USA. The group is also operating a Tier 2 computing GRID site for the Belle II experiment.

### Group Coordinator

**Arunansu Sil**

** Professor**

0361-2582719

asil [at] iitg.ac.in

Bipul Bhuyan

Professor

Subhaditya Bhattacharya

Associate Professor

Debasish Borah

Associate Professor

Sovan Chakraborty

Associate Professor

Meduri C Kumar

Associate Professor

Soumitra Nandi

Associate Professor

Dr. Jayita Lahiri

Dr. Atanu Nath

Dr. Pulak Banerjee

SNEHA JAISWAL

Suresh Chand

SHUBHANGI KRISHAN MAURYA

DIPANKAR PRADHAN

ESHA BHATIA

SOUMEN KUMAR MANNA

CHINMOY DEY

LIPIKA KOLAY

SHANTANU SAHOO

INDRAJIT SAHA

RAKSHANDA GOSWAMI

SHIVAM

UTSAB DEY

DIPENDU BHANDARI

NAYAN DAS

SOURAV MONDAL

ABHIK SARKAR

BHOOMIKA DAS

HRISHIKESH DEKA

NILOY MONDAL

SHAILESH PINCHA

VAIBHAV PANDEY

ARKODIP BISWAS

DISHA BANDYOPADHYAY

NIRAJ KOIRALA

SUBHAJIT KALA

TARUN CHANDA

DR. SUDIPTA NANDY

DR. DEBOJIT SARMA

DR. ABHIJIT BORAH

DR. VINDHYAWASINI PRASAD

DR. DEEPANWITA DUTTA

DR. SATENDRA KUMAR

DR. BISWAJIT KARMAKAR

DR. KAMAL JYOTI NATH

DR. NITIN YADAV

DR. ABHIJIT KUMAR SAHA

DR. BISWARANJAN DAS

DR. SHIBANANDA SAHOO

DR. PANKAJ SAHA

DR. SUBHASISH BEHERA

DR. PULAK TALUKDAR

DR. SRIMOY BHATTACHARYA

DR. DEEPANJALI GOSWAMI

DR. PURUSOTTAM GHOSH

DR. GHANASHYAM MEHER

DR. RISHAV ROSHAN

DR. SREEMANTI CHAKRABORTI

DR. BASABENDU BARMAN

DR. KAJAL SAMANTA

DR. LOPAMUDRA MUKHERJEE

DR. DIBYENDU NANDA

DR. IPSITA RAY

DR. DEVABRAT MAHANTA

DR. DEVENDER KUMAR

DR. MADHURIMA CHAKRABORTY

DR. ARGHYAJIT DATTA

DR. JYOTIRMOI BORAH

DR. PRANTIK SARMAH

DR. SAHABUB JAHEDI

DR. SURUJ JYOTI DAS

Dr. Biswajit Choudhury

[ ]

Dr. Sunando Patra

[ 2018 ]

Dr. Rashidul Islam

[ ]

Dr. Amit Dutta Banik

[ ]

Dr. Anirban Biswas

[ Jun, 2018 ]

Dr. Manoj Kumar Mandal

[ ]

DR. SOUMITA PRAMANICK

[ November, 2020 ]

DR. ARITRA BISWAS

[ September, 2022 ]

Dr. Happy Borgohain

[ Jun, 2020 ]

Dr. Bharti Kindra

[ July, 2021 ]

Dr. Pritam Das

[ Dec, 2023 ]

Dr. Ria Sain

[ August, 2024 ]

#### Journals

B. Bhuyan (Belle Collaboration)

*"Search for the rare decay of with improved hadronic tagging",*Physical Review D vol.98, no.11, pp.112016, [2018]B. Bhuyan (Belle Collaboration)

*"Measurement of the branching fraction and time-dependent CP asymmetry for decays ",*Physical Review D vol.98, no.11, pp.112008, [2018]B. Bhuyan (NOvA Collaboration)

*"New constraints on oscillation parameters from appearance and disappearance in the NOvA experiment",*Physical Review D vol.98, no., pp.32012, [2018]B. Bhuyan (Belle Collaboration)

*"Search for and at , 10.58 and 10.867 GeV ",*Physical Review D vol.97, no.11, pp.112004, [2018]B. Bhuyan (BaBar Collaboration)

*"Study of radiative decays to and ",*Physical Review D vol.97, no.11, pp.112006, [2018]B. Bhuyan (Belle Collaboration)

*"Search for decays at the Belle experiment",*Physical Review Letters vol.121, no.3, pp.31801, [2018]B. Bhuyan et al., Belle Collaboration

*"Measurement of the τ lepton polarization and R(D∗) in the decay ¯B→D∗τ−¯ντ with one-prong hadronic τ decays at Belle",*Phys. Rev. D vol.97, no., pp.12004, [2018]B. Bhuyan et al.

*"Search for D0 decays to invisible final states at Belle",*Physics Review D (Rapid Communications) vol.95, no. , pp.011102-1-011102-8, [2017]B. Bhuyan et al.

*"Search for B+-> K+tau+tau- at the BaBar experiment",*Phys. Rev. Lett. vol.118, no. , pp.031802-1-031802-8, [2017]B. Bhuyan et al. (NOvA Collaboration)

*"Constraints on Oscillation Parameters from νe Appearance and νμ Disappearance in NOvA",*Phys. Rev. Lett. vol.118, no. , pp.231801, [2017]B. Bhuyan et al., BaBar Collaboration

*"Search for Invisible Decays of a Dark Photon Produced in e+e− Collisions at BaBar",*Phys. Rev. Lett. vol.119, no. , pp.131804, [2017]B. Bhuyan et al. (NOvA Collaboration)

*"Measurement of the Neutrino Mixing Angle θ_23 in NOvA",*Phys. Rev. Lett. vol.118, no. , pp.151802, [2017]Subhaditya Bhattacharya, Abhijit Kumar Saha, Arunansu Sil and Jose Wudka

*"Dark matter as a remnant of SQCD inflation ",*JHEP vol.1810, no.5, pp.124, [2018]Subhaditya Bhattacharya, Ivo de Medeiros Varzielas, BiswajitKarmakar, Stephen F. King and Arunansu Sil Abhijit Kumar Saha, Arunansu Sil and Jose Wudka

*"Dark side of the seesaw ",*JHEP vol.1812, no., pp.7, [2018]Basabendu Barman, Subhaditya Bhattacharya and Mohammadreza Zakeri

*"Multipartite Dark Matter in SU(2)N extension of Standard Model and signatures at the LHC ",*JCAP vol.9, no.23, pp. , [2018]Subhaditya Bhattacharya, Sudip Jana, S. Nandi

*"Neutrino Masses and Scalar Singlet Dark Matter",*Phys.Rev. D vol.95, no.5, pp.55003, [2017]Subhaditya Bhattacharya, Nirakar Sahoo, Narendra Sahu

*"Singlet-Doublet Fermionic Dark Matter, Neutrino Mass and Collider Signatures",*Phys. Rev. D vol.96, no.3, pp.35010, [2017]Basabendu Barman, Subhaditya Bhattacharya, Sunando Kumar Patra, Joydeep Chakrabortty

*"Non-Abelian Vector Boson Dark Matter, its Unified Route and signatures at the LHC",*JCAP vol.1712, no.12, pp.21, [2017]Subhaditya Bhattacharya, Biswajit Karmakar, Narendra Sahu and Arunansu Sil

*"Flavor origin of dark matter and its relation with leptonic nonzero heta_13 and Dirac CP phase delta",*JHEP vol.1705, no. , pp.68, [2017]Subhaditya Bhattacharya, Purusottam Ghosh,Poulose Poulose

*" Multipartite Interacting Scalar Dark Matter in the light of updated LUX data",*Journal of Cosmology and Astroparticle Physics (JCAP) vol.JCAP 1704 , no.4, pp. , [ April 2017 ]D. Borah, A. Dasgupta and S. Patra

*"Neutrinoless double beta decay in minimal left-right symmetric model with universal seesaw",*International Journal of Modern Physics A vol.33, no. , pp.1850198, [2018]A. Biswas, D. Borah and D. Nanda

*"keV Neutrino Dark Matter in a Fast Expanding Universe",*Physics Letters B vol.786, no. , pp.364, [2018]A. Biswas, D. Borah and D. Nanda

*"When freeze-out precedes freeze-in: sub-TeV fermion triplet dark matter with radiative neutrino mass",*Journal of Cosmology and Astroparticle Physics vol.1809, no. , pp.14, [2018]D. Borah, B. Karmakar and D. Nanda

*"Common origin of Dirac neutrino mass and freeze-in massive particle dark matter",*Journal of Cosmology and Astroparticle Physics vol.1807, no. , pp.39, [2018]D. Borah, M. K. Das and A. Mukherjee

*"Common origin of non-zero theta13 and baryon asymmetry of the Universe in a TeV scale seesaw model with A4 flavour symmetry",*Physical Review D vol.97, no. , pp.115009, [2018]D. Borah and B. Karmakar

*"A4 Flavour Model for Dirac Neutrinos: Type I and Inverse Seesaw",*Physics Letters B vol.780, no. , pp.461, [2018]D. Borah, B. Fuks, D. Goswami and P. Poulose

*"Investigating the scalar sector of left-right symmetric models with leptonic probes",*Physical Review D vol.98, no. , pp.35008, [2018]D. Borah et al.

*"A White Paper on keV Sterile Neutrino Dark Matter",*Journal of Cosmology and Astroparticle Physics vol.1701, no.1, pp.25-263, [2017]D. Borah

*"Non-zero theta13 with unbroken mu-tau symmetry of the active neutrino mass matrix in the presence of a light sterile neutrino",*Physical Review D vol.95, no.3, pp.035016-1-035016-16, [2017]D. Borah and A. Dasgupta

*"Observable Lepton Number Violation with Predominantly Dirac Nature of Active Neutrinos",*Journal of High Energy Physics vol.1701, no.1, pp.072-103, [2017]Debasish Borah, Sudhanwa Patra

*"Universal seesaw and 0νββ in new 3331 left-right symmetric model",*Physics Letters B vol.771, no. , pp.318, [2017]Debasish Borah, Arnab Dasgupta

*"Naturally light Dirac neutrino in Left-Right Symmetric Model",*Journal of Cosmology and Astroparticle Physics vol.1706, no.6, pp.3, [2017]Ananya Mukherjee, Debasish Borah, Mrinal Kumar Das

*" Common Origin of Non-zero θ13 and Dark Matter in an S4 Flavour Symmetric Model with Inverse Seesaw",*Physical Review D vol.96, no.1, pp.15014, [2017]Debasish Borah, Soumya Sadhukhan, Shibananda Sahooo

*"Lepton Portal Limit of Inert Higgs Doublet Dark Matter with Radiative Neutrino Mass",*Physics Letters B vol.771, no., pp.624, [2017]Debasish Borah, Arnab Dasgupta, Ujjal Kumar Dey, Sudhanwa Patra, Gaurav Tomar

*"Multi-component Fermionic Dark Matter and IceCube PeV scale Neutrinos in Left-Right Model with Gauge Unification",*Journal of High Energy Physics vol.1709, no. , pp.5, [2017]Debasish Borah, Monojit Ghosh, Shivani Gupta, Sushant K Raut

*"Texture zeros of low-energy Majorana neutrino mass matrix in 3+1 scheme",*Physical Review D vol.96, no.5, pp.55017, [2017]Debasish Borah, Aritra Gupta

*" New viable region of an inert Higgs doublet dark matter model with scotogenic extension",*Physical Review D vol.96, no.11, pp.115012, [2017]Dibyendu Nanda, Debasish Borah

*" Common origin of neutrino mass and dark matter from anomaly cancellation requirements of a U(1)B−L model",*Physical Review D vol.96, no.11, pp.115014, [2017]Kalpana Bora, Debasish Borah, Debajyoti Dutta

*"Probing Majorana neutrino textures at DUNE",*Physical Review D vol.96, no.7, pp.75006, [2017]Debasish Borah, Arnab Dasgupta, Sudhanwa Patra

*"Common origin of 3.55 keV x-ray line and gauge coupling unification with left-right dark matter",*Physical Review D vol.96, no.11, pp.115019, [2017]Abhijit Bandyopadhyay, Pijushpani Bhattacharjee, Sovan Chakraborty, Kamales Kar and Satyajit Saha

*"Detecting supernova neutrinos with iron and lead detectors",*Phys. Rev. D vol.95, no.6, pp.065022-1-065022-11, [2017]T. Ahmed, P. Banerjee, P. K. Dhani, M. C. Kumar, P. Mathews, N. Rana and V. Ravindran

*"NNLO QCD corrections to the Drell-Yan cross section in models of TeV-scale gravity",*European Physical Journal C vol.77, no.22, pp.Jan-26, [2017]Z. Calcuttawala, A. Kundu, S. Nandi and S. Patra

*"New physics with the lepton flavor violating decay τ→3μ",*Physical Review D vol.97, no.9, pp.095009-1-095009-15, [2018]Zaineb Calcuttawala, Anirban Kundu, Soumitra Nandi, Sunando Kumar Patra

*"Optimal observable analysis for the decay b→s plus missing energy",*Eur.Phys.J. C vol.77, no.9, pp.650, [2017]Debajyoti Choudhury (Delhi U.) , Anirban Kundu, Soumitra Nandi, Sunando Kumar Patra

*"Unified resolution of the R(D) and R(D∗) anomalies and the lepton flavor violating decay h→μτ",*Physical Review D vol.95, no. no.3, pp.35021, [2017]Sneha Jaiswal, Soumitra Nandi, Sunando Kumar Patra

*"Extraction of |Vcb| from B→D(∗)ℓνℓ and the Standard Model predictions of R(D(∗))",*Journal of High energy Physics vol.1712, no.60, pp. , [2017]Srimoy Bhattacharya, Soumitra Nandi, Sunando K. Patra

*"Looking for possible new physics in B→D(∗)τντ in light of recent data",*Physical Review D vol.95, no.7, pp.75012, [2017]D. Borah, B. Fuks, D. Goswami and P. Poulose

*"Investigating the scalar sector of left-right symmetric models with leptonic probes",*Physical Review D vol.98, no. , pp.35008, [2018]B. Das, S. Moretti, S. Munir and P. Poulose

*"Quantum Interference among heavy NMSSM Higgs bosons",*Phys. Rev. D vol.98, no.5, pp.5020, [2018]Deepanjali Goswami and P. Poulose

*"Direct searches of Type III seesaw triplet fermions at high energy e+e− collider ",*Eur.Phys.J. C vol.78, no.1, pp.42, [2018]Baradhwaj Coleppa, Benjamin Fuks, P. Poulose and Shibananda Sahoo

*"Seeking Heavy Higgs Bosons through Cascade Decays",*Phys.Rev. D vol.97, no.7, pp.75007, [2018]P. Poulose, Shibananda Sahoo and K. Sridhar

*"Exploring the Inert Doublet Model through the dijet plus missing transverse energy channel at the LHC ",*Phys. Lett. B vol.765, no. , pp. 300-306, [2017]Biswaranjan Das, Stefano Moretti, Shoaib Munir and Poulose Poulose

*"Two Higgs bosons near 125 GeV in the NMSSM: beyond the narrow width approximation",*Eur.Phys.J. C vol.77, no.8, pp.544, [2017]Udit Raha, Yuki Kamiya, Shung-Ichi Ando and Tetsuo Hyodo

*"Universal physics of the few-body system of two neutrons and one flavored meson",*Physics Review C vol.98, no.3, pp.34002, [2018]Pulak Talukdar, Fred Myhrer, Ghanashyam Meher and Udit Raha

*"Low-Energy Lepton-Proton Bremsstrahlung via Effective Field Theory",*European Physics Journal A vol.54, no.11, pp.195, [2018]Fred Myhrer, Pulak Talukdar and Udit Raha

*"Lepton Bremsstrahlung at Low Energies",*Few Body Systems vol.59, no.4, pp.62, [2018]Subhaditya Bhattacharya, Abhijit Kumar Saha, Arunansu Sil and Jose Wudka

*"Dark matter as a remnant of SQCD inflation ",*JHEP vol.1810, no.5, pp.124, [2018]Subhaditya Bhattacharya, Ivo de Medeiros Varzielas, BiswajitKarmakar, Stephen F. King and Arunansu Sil Abhijit Kumar Saha, Arunansu Sil and Jose Wudka

*"Dark side of the seesaw ",*JHEP vol.1812, no., pp.7, [2018]Amit Dutta Banik, Abhijit Kumar Saha, and Arunansu Sil

*"Scalar assisted singlet doublet fermion dark matter model and electroweak vacuum stability ",*Phys. Rev. D vol.98, no. , pp.075013-01-23, [2018]Purusottam Ghosh, Abhijit Kumar Saha and Arunansu Sil

*"Study of Electroweak Vacuum stability from extended Higgs portal of dark matter and neutrinos",*Phys. Rev. D vol.97, no. , pp.75034, [2018]Biswajit Karmakar and Arunansu Sil

*"Connecting nonzero theta_13, Dirac CP phase and leptogenesis through spontaneous CP violation",*J. Phys. Conf. Ser. vol.888, no.1, pp.12177, [2018]Abhijit Kumar Saha, Arunansu Sil

*"Higgs Vacuum Stability and Modified Chaotic Inflation",*Physics Letters B vol.765, no. , pp.244, [2017]Biswajit Karmakar and Arunansu Sil

*"An A_4 realization of inverse seesaw:neutrino masses, theta_13 and leptonic non-unitarity",*Phys. Rev. D vol.96, no.1, pp.15007, [2017]Subhaditya Bhattacharya, Biswajit Karmakar, Narendra Sahu and Arunansu Sil

*"Flavor origin of dark matter and its relation with leptonic nonzero heta_13 and Dirac CP phase delta",*JHEP vol.1705, no. , pp.68, [2017]

#### Conferences

Nitin Yadav, B. Bhuyan et al.

*"Cosmic Muon induced EM showers in NovA Detector",*Proceedings of Science (ICHEP 2016) vol., no. , pp. , [2017]Kamal Nath, B. Bhuyan et al.

*"Recent results on charmless B0 and B0s decays from Belle",*Proceedings of Science (ICHEP 2016) vol., no. , pp. , [2017]P. Poulose, S. Sahoo and K. Sridhar

*"Searching the inert scalars through the dijet plus missing transverse energy final states at high luminosity",*Springer Proc. Phys., Vol. 203 vol., no. , pp.411-413 , [2018]Abhijit Kumar Saha and Arunansu Sil

*"Stabilizing Electroweak Vacuum Through Modified Chaotic Inflation",*XXII DAE High Energy Physics Symposium [Part of the Springer Proceedings in Physics book(SPPHY, volume 203)] vol., no. , pp.559-562, [2018]