Prasanta Kumar Das

Bose Institute

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Co-Authors

Saumyen Kundu

Birla Institute of Technology and Science, Pilani

Uma Mahanta

Harish-Chandra Research Institute

Payel Sarkar

Birla Institute of Technology and Science, Pilani

R. Rath

Suranaree University of Technology

G. Bruno

Istituto Nazionale di Fisica Nucleare, Sezione di Bari

M. Germain

IMT Atlantique

G. Volpe

Istituto Nazionale di Fisica Nucleare, Sezione di Bari

K. Schweda

GSI Helmholtz Centre for Heavy Ion Research

D. Evans

University of Birmingham

E. Scomparin

Istituto Nazionale di Fisica Nucleare, Sezione di Torino

Cooperative Institutions

A. Alikhanyan National Laboratory

2,162

European Organization for Nuclear Research

799

Istituto Nazionale di Fisica Nucleare, Sezione di Torino

452

Universidad Nacional Autónoma de México

441

Istituto Nazionale di Fisica Nucleare, Sezione di Bologna

398

Central China Normal University

356

Technical University of Munich

343

Aligarh Muslim University

336

University of Bergen

301

University of Houston

283

Author Statistics

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Jet substructure probe to unfold singlet-doublet dark matter in the presence of non-standard cosmology

Journal of High Energy Physics (2023)

Prasanta Kumar Das Partha Konar Saumyen Kundu Sudipta Show

A bstract We examine the singlet-doublet fermionic dark matter model, where the non-thermal production of the dark matter in light of a non-standard cosmology demands a significantly large interaction rate than the typical radiation-dominated Universe. Despite being a model of freeze-in light dark matter and heavy mediator, the characteristic long-lived particle searches at the collider experiment and the displaced vertex signature do not help in probing such a dark sector since this non-standard interaction mandates nearly prompt decay. We make a counterproposal to probe such signal with di-fat-jets generated from the boosted decays of massive vector bosons and Standard Model Higgs, along with the substantial missing transverse momentum to probe the dark matter at LHC. Interestingly, substructure variables associated with these fat jets have an additional handle to tackle the extensive QCD background as it encodes implicit footmarks of their origin. We adopt the multivariate analysis with the booted decision tree to constrain the measured relic density allowed parameter space of dark matter in the presence of the modified cosmological scenario. Our study shows how the non-trivial expansion affects dark matter production in the early Universe and alters the required search strategies at colliders. This probe provides the best discovery prospect at the HL-LHC for extended parameter space now opened up in the dark sector.

Light dark matter

QCD matter

10.1007/jhep06(2023)198

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Citations (4)

Emergent cosmology in models of nonlinear electrodynamics

New Astronomy (2023)

Payel Sarkar Prasanta Kumar Das

Big Bounce

10.1016/j.newast.2023.102003

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Citations (5)

COSMIC BIREFRINGENCE WITHIN THE FRAMEWORK OF HETEROTIC STRING THEORY

International Journal of Modern Physics A (2001)

Prasanta Kumar Das Pankaj Jain Sudipta Mukherji

Low energy string theory predicts the existence of an axion field which can lead to cosmic birefringence. We solve the electromagnetic wave equations in the presence of such an axion and a dilaton field in order to determine their effect on the polarization of light. We find that the presence of dilaton field leads to a nontrivial modification of the final result. We comment on the possibility of discovering such an effect by observations of radio wave polarizations from distant radio galaxies and quasars. We have also determined the limits on the string theory parameters that are imposed by the current polarization data from distant quasars and radio galaxies.

Dilaton

Cosmic string

10.1142/s0217751x01004840

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Citations (25)

Charmless non-leptonic $B \to \phi K_2^{*}$ decay with a tensor $K_2^{*}$ meson in the final state: A Probe to New Physics

arXiv (Cornell University) (2005)

Prasanta Kumar Das

This paper has been withdrawn by the author due to the following reason. One of his(author) collaborator rightly claims that the idea of this work belongs not from the author, but from him (the collaborator).

Source

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Testable (g−2) contribution due to a light stabilized radion in the Randall–Sundrum model

Nuclear Physics B (2002)

Prasanta Kumar Das Uma Mahanta

Anomaly (physics)

Randall–Sundrum model

10.1016/s0550-3213(02)00743-5

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Citations (8)

HERA constraints on warped quantum gravity

Journal of High Energy Physics (2000)

Prasanta Kumar Das Sreerup Raychaudhuri Saswati Sarkar

10.1088/1126-6708/2000/07/050

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Citations (9)

THE INCLUSIVE SEMI-LEPTONIC $\bar B \to X_s \mu^+ \mu^-$ AND LEPTONIC $\bar{B}_s \rightarrow \mu^+ \mu^-$ DECAYS IN THE PRESENCE OF A LIGHT STABILIZED RADION IN RANDALL–SUNDRUM MODEL

Modern Physics Letters A (2012)

Prasanta Kumar Das

The Belle collaboration has reported [Formula: see text] for the inclusive decay [Formula: see text]. Recently, the LHCb and the CMS collaboration has released the combined limit [Formula: see text]. The standard model results of the [Formula: see text] and [Formula: see text] are found to be within the 1σ of the experimental result. Taking a conservative viewpoint, we use these decays to constrain the braneworld Randall–Sundrum model. The stabilized radion in the Randall–Sundrum model, which is an electro-weak singlet, can cause the flavor changing neutral current (FCNC) b →s transition at the oneloop level. We investigate the possible impact of a stabilized radion on the above two decays and obtain the possible constraints on the radion vev 〈ϕ〉 for an ultra-light radion.

Randall–Sundrum model

Bar (unit)

10.1142/s0217732312500435

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Citations (1)

Exploring the Electromagnetically Interacting Dark Matter at the International Linear Collider

arXiv (Cornell University) (2023)

Manish Sharma Saumyen Kundu Prasanta Kumar Das

Dark Matter being electrically neutral does not participate in electromagnetic interactions at leading order. However, we discuss here fermionic dark matter (DM) with permanent magnetic and electric dipole moment that interacts electromagnetically with photon at loop-level through a dimension-5 operator. We discuss the search prospect of the dark matter at the proposed International Linear Collider (ILC) and constrain the parameter space in the plane of the DM mass and the cutoff scale $\Lambda$. At the 500 GeV ILC with $4$ ab$^{-1}$ of integrated luminosity we probed the mono-photon channel and utilizing the advantages of beam polarization we obtained an upper bound on the cutoff scale that reaches up to $\Lambda = 3.72$ TeV.

International Linear Collider

Cut-off

10.48550/arxiv.2311.17220

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Impact of a light stabilized radion in supernovae cooling

arXiv (Cornell University) (2012)

Prasanta Kumar Das J. Selvaganapathy Chandradew Sharma T. K. Jha V. Sunil Kumar

In the Randall-Sundrum model where the Standard Model fields are confined to the TeV brane located at the orbifold point $\theta = \pi$ and the gravity peaks at the Planck brane located at $\theta = 0$, the stabilized modulus (radion) field is required to stabilize the size of the fifth spatial dimension. It can be produced copiously inside the supernova core due to nucleon-nucleon bremstrahlung, electron-positron and plasmon-plasmon annihilations, which then subsequently decays to neutrino-antineutrino pair and take away the energy released in SN1987A explosion. Assuming that the supernovae cooling rate $\dot{\varepsilon} \le 7.288\times 10^{-27} \rm{GeV}$, we find the lower bound on the radion vev $\vphi \sim 9.0$ TeV, 2.2 TeV and 0.9 TeV corresponding to the radion mass $m_\phi = 5$ GeV, 20 GeV and 50 GeV, respectively.

Planck mass

Randall–Sundrum model

10.48550/arxiv.1210.7407

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THE EFFECT OF A LIGHT RADION ON THE TRIVIALITY BOUND ON HIGGS MASS

International Journal of Modern Physics A (2005)

Uma Mahanta Prasanta Kumar Das

In this paper we study how the triviality bound on Higgs mass in the context of the Standard Model is modified by a light stabilized radion of the Goldberger–Wise variety. Our approach is inherently perturbative. Including the radion contribution to β(λ) and β(g t ) to one-loop we evolve the Higgs self coupling λ from the cutoff Λ(=<ϕ>) down to the electroweak scale μ 0 =v. The triviality bound is obtained by requiring that [Formula: see text] which is the perturbative limit. We also study the effect of small changes in the UVBC on the triviality bound both in the presence and absence of a light radion.

Triviality

Electroweak scale

Technicolor

Cut-off

10.1142/s0217751x05020719

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Citations (1)