Publications (47)
Pushing the SUSY Higgs mass towards 125 GeV with a color adjoint
Gautam Bhattacharyya, Tirtha Sankar Ray
We show that inclusion of a TeV scale chiral superfield transforming in the adjoint representation of the color SU(3) to the MSSM particle content modifies the renormalization grou…
Exchange driven freeze out of dark matter
Tarak Nath Maity, Tirtha Sankar Ray
We introduce a novel mechanism where processes that preserve the number density of the dark sector set the relic density of a thermal particulate dark matter. In a relatively degen…
Prospects of Migdal Effect in the Explanation of XENON1T Electron Recoil Excess
Ujjal Kumar Dey, Tarak Nath Maity, Tirtha Sankar Ray
The XENON1T experiment has recently announced the observation of an excess in electron recoil events at energy range of keV with a signal significance over the Stand…
A phenomenological study of 5d supersymmetry
Gautam Bhattacharyya, Tirtha Sankar Ray
Supersymmetry and extra dimension need not be mutually exclusive options of physics for the TeV scale and beyond. In this paper, we envisage a phenomenological scenario by embeddin…
Resonant Assisted Annihilation
Tarak Nath Maity, Tirtha Sankar Ray
Assisted annihilation is a novel mechanism to generate viable sub-GeV thermal dark matter, where a pair of stable dark matter annihilates with an assister to Standard Model states.…
Novel Collider and Dark Matter Phenomenology of a Top-philic Z'
Peter Cox, Anibal D. Medina, Tirtha Sankar Ray +1
We consider extending the Standard Model by including an additional Abelian gauge group broken at low energies under which the right-handed top quark is the only effectively charge…
UV descriptions of composite Higgs models without elementary scalars
James Barnard, Tony Gherghetta, Tirtha Sankar Ray
We consider four-dimensional UV descriptions of composite Higgs models without elementary scalars, in which four-fermion interactions are introduced to an underlying gauge theory l…
Impact of a colored vector resonance on the collider constraints for top-like top partner
Sayan Dasgupta, Santosh Kumar Rai, Tirtha Sankar Ray
In this work we reappraise the collider constraints from leptonic final states on the vectorlike colored top partners taking into account the impact of exotic colored vector resona…
Naturally split supersymmetry
Gautam Bhattacharyya, Tirtha Sankar Ray
Nonobservation of superparticles till date, new Higgs mass limits from the CMS and ATLAS experiments, WMAP constraints on relic density, various other low energy data, and the natu…
On the possibility of generating leading order gaugino masses in direct gauge mediation scenario
Tirtha Sankar Ray
Generating gaugino masses at the leading order has typically been difficult in direct/semi-direct gauge mediated supersymmetry breaking models. The Komargodski-Shih theorem has est…
Neutrinos from captured dark matter annihilation in a galactic population of neutron stars
Debajit Bose, Tarak Nath Maity, Tirtha Sankar Ray
Particulate dark matter captured by a population of neutron stars distributed around the galactic center while annihilating through long-lived mediators can give rise to an observa…
Higgs-Gluon Coupling in Warped Extra Dimensional Models with Brane Kinetic Terms
Ujjal Kumar Dey, Tirtha Sankar Ray
Warped models with the Higgs confined to the weak brane and the gauge and matter fields accessing the bulk provide viable setting to address the gauge hierarchy problem. Br…
Burgeoning the Higgs mass to 125 GeV through messenger-matter interactions in GMSB models
Pritibhajan Byakti, Tirtha Sankar Ray
A 125 GeV Higgs renders the simpler GMSB models unnatural, essentially pushing the soft spectrum beyond the LHC reach. A direct coupling of the matter and messenger fields, that fa…
Broad toplike vector quarks at LHC and HL-LHC
Sayan Dasgupta, Rohan Pramanick, Tirtha Sankar Ray
Top like vector quarks arising from underlying strong sectors are expected to have large decay widths pushing them beyond the narrow width approximation. In this paper we consider…
Halo uncertainties in electron recoil events at direct detection experiments
Tarak Nath Maity, Tirtha Sankar Ray, Sambo Sarkar
The dark matter direct detection rates are highly correlated with the phase space distribution of dark matter particles in our galactic neighbourhood. In this paper, we make a syst…
Status of Flavour Maximal Non-minimal Universal Extra Dimension
Sayan Dasgupta, Ujjal Kumar Dey, Tapoja Jha +1
In this paper we consider an compactified flat extra dimensional scenario where all the standard model states can access the bulk and have generalised brane lo…
Implications of diphoton searches for a Radion in the Bulk-Higgs Scenario
Peter Cox, Anibal D. Medina, Tirtha Sankar Ray +1
In this work we point out that the apparent diphoton excess initially presented by the ATLAS and CMS collaborations could have originated from a radion in the bulk Higgs scenario w…
Mitigating Direct Detection Bounds in Non-minimal Higgs Portal Scalar Dark Matter Models
Subhaditya Bhattacharya, Purusottam Ghosh, Tarak Nath Maity +1
Minimal scalar Higgs portal dark matter model is increasingly in tension with recent results form direct detection experiments like LUX and XENON. In this paper we make a systemati…
Minimal supersymmetry confronts , and
Gautam Bhattacharyya, Anirban Kundu, Tirtha Sankar Ray
We study the impact of the measurements of three sets of observables on the parameter space of the constrained minimal supersymmetric Standard Model (cMSSM), its slightly general v…
Constraints on dark matter self-interaction from velocity distribution function in isolated halos
Tirtha Sankar Ray, Sambo Sarkar
Self-interactions facilitate inter-particle redistribution of energy within the dense regions of galactic halos, implying modifications in the density and velocity distribution of…
Light Dark Matter through Assisted Annihilation
Ujjal Kumar Dey, Tarak Nath Maity, Tirtha Sankar Ray
In this paper we investigate light dark matter scenarios where annihilation to Standard Model particles at tree-level is kinematically forbidden. In such cases annihilation can be…
Constraining Composite Higgs Models using LHC data
Avik Banerjee, Gautam Bhattacharyya, Nilanjana Kumar +1
We systematically study the modifications in the couplings of the Higgs boson, when identified as a pseudo Nambu-Goldstone boson of a strong sector, in the light of LHC Run 1 and R…
Same sign di-lepton candles of the composite gluons
Aleksandr Azatov, Debtosh Chowdhury, Diptimoy Ghosh +1
Composite Higgs models, where the Higgs boson is identified with the pseudo-Nambu-Goldstone-Boson (pNGB) of a strong sector, typically have light composite fermions (top partners)…
Solar constraints on captured electrophilic dark matter
Debajit Bose, Tarak Nath Maity, Tirtha Sankar Ray
Dark matter captured by interaction with electrons inside the Sun may annihilate via long-lived mediator to produce observable gamma ray signals. We utilize solar gamma ray flux me…
The Higgsino-Singlino World at the Large Hadron Collider
Jong Soo Kim, Tirtha Sankar Ray
We consider light higgsinos and singlinos in the next-to-minimal supersymmetric Standard Model at the Large Hadron Collider. We assume that the singlino is the lightest supersymmet…
Constraints on dark matter self-interaction from galactic core size
Tirtha Sankar Ray, Sambo Sarkar, Abinash Kumar Shaw
Self-interaction of particulate dark matter may help thermalising the central region of the galactic halo and driving core formation. The core radius is expectedly sensitive to the…
Constraining minimal and non-minimal UED models with Higgs couplings
Ujjal Kumar Dey, Tirtha Sankar Ray
Early indications from the LHC for the observed scalar boson imply properties close to the Standard Model Higgs, putting considerable constraints on TeV scale new physics scenarios…
Troubles mounting for multipolar dark matter
Debajit Bose, Debtosh Chowdhury, Poulami Mondal +1
In this paper, we revisit the experimental constraints on the multipolar dark matter that has derivative coupling to the visible sector mediated by the Standard Model photon. The m…
Clockworked VEVs and Neutrino Mass
Avik Banerjee, Subhajit Ghosh, Tirtha Sankar Ray
In this paper we present an augmented version of the Abelian scalar clockwork model to generate geometrically suppressed vacuum expectation values (vev) of the pseudo Nambu-Goldsto…
Cogenesis of visible and dark matter in a scotogenic model
Debajit Bose, Rohan Pramanick, Tirtha Sankar Ray
Within a scotogenic neutrino mass model we explore the cogenesis of matter from the CP violating decay of a heavy -odd right handed neutrino that simultaneously popul…
On Composite Two Higgs Doublet Models
Enrico Bertuzzo, Tirtha Sankar Ray, Hiroshi de Sandes +1
We investigate composite two Higgs doublet models realized as pseudo Goldstone modes, generated through the spontaneous breaking of a global symmetry due to strong dynamic at the T…
Probing Axion Dark Matter via the Chiral Magnetic Effect in Zero-Bias Weyl Semimetals
Debajit Bose, Prataya Chandra, Sudhansu S. Mandal +1
Sub-eV axion dark matter behaves as a coherent classical field that can induce macroscopic current in quantum materials. We explore the possibility of axion detection via the chira…
Boosting Assisted Annihilation for a Cosmologically Safe MeV Scale Dark Matter
Ujjal Kumar Dey, Tarak Nath Maity, Tirtha Sankar Ray
Assisted annihilation generates thermal sub-GeV dark matter through a novel annihilation between a pair of dark matter and standard-model-like states, called the "assister". We sho…
Gluino, wino and Higgsino-like particles without supersymmetry
Tirtha Sankar Ray, Hiroshi de Sandes, Carlos Savoy
Metastable charged particles produced at the LHC can decay in the quiescent period between beam crossing in the detector leading to spectacular signals. In this paper we consider a…
Neutrino mass and leptogenesis in a hybrid seesaw model with a spontaneously broken CP
Rohan Pramanick, Tirtha Sankar Ray, Avirup Shaw
We introduce a novel hybrid framework combining type I and type II seesaw models for neutrino mass where a complex vacuum expectation value of a singlet scalar field breaks CP spon…
Probing warped extra dimension via gg -> h and h -> gamma gamma at LHC
Gautam Bhattacharyya, Tirtha Sankar Ray
The processes gg -> h and h -> gamma gamma are of paramount importance in the context of Higgs search at the LHC. These processes are loop driven and hence could be sensitive to th…
Towards a more complete description of hybrid leptogenesis
Rohan Pramanick, Tirtha Sankar Ray, Arunansu Sil
Hybrid leptogenesis framework combining type I and type II seesaw mechanism for neutrino mass necessarily include scattering topologies involving both the scalar triplet and the ri…
Radion/Dilaton-Higgs Mixing Phenomenology in Light of the LHC
Peter Cox, Anibal D. Medina, Tirtha Sankar Ray +1
Motivated by the bulk mixing between a massive radion and a bulk scalar Higgs in warped extra dimensions, we construct an effective four dimensional action tha…
Improving Fine-tuning in Composite Higgs Models
Avik Banerjee, Gautam Bhattacharyya, Tirtha Sankar Ray
In this paper we investigate the next-to-minimal composite Higgs model with a SO(6)/SO(5) coset, whose pNGB sector includes a Standard Model singlet in addition to the usual Higgs…
Reappraisal of the minimal flavoured scenario
Tirtha Sankar Ray, Avirup Shaw
Recent results from the intensity frontier indicate the tantalizing possibility of violation in lepton flavour universality. In light of this we revisit the minimal phenomenologica…
Probing composite Higgs boson substructure at the HL-LHC
Avik Banerjee, Sayan Dasgupta, Tirtha Sankar Ray
The Higgs boson may well be a composite scalar with a finite extension in space. Owing to the momentum dependence of its couplings the imprints of such a composite pseudo Goldstone…
Beyond The Standard Model: Some Aspects of Supersymmetry and Extra Dimension
Tirtha Sankar Ray
In this thesis we have explored some of the phenomenological aspects of warped/flat extra dimensional theories and their interface with supersymmetry. We study the numerical impact…
Radiative correction to the lightest neutral Higgs mass in warped supersymmetry
Gautam Bhattacharyya, Swarup Kumar Majee, Tirtha Sankar Ray
We compute radiative correction to the lightest neutral Higgs mass () induced by the Kaluza-Klein (KK) towers of fermions and sfermions in a minimal supersymmetric scenario em…
Dark Energy from pNGB Mediated Dirac Neutrino Condensate
Ujjal Kumar Dey, Tirtha Sankar Ray, Utpal Sarkar
We consider an extension of the Standard Model that provide an unified description of eV scale neutrino mass and dark energy. An explicit model is presented by augmenting the Stand…
Neutrinos from captured dark matter in galactic stars
Debajit Bose, Rohan Pramanick, Tirtha Sankar Ray
Sub-GeV neutrinos produced in a stellar core may emerge from main sequence stars, white dwarfs and brown dwarfs producing possible observable signals of dark matter capture. A dist…
The Unnatural Composite Higgs
James Barnard, Tony Gherghetta, Tirtha Sankar Ray +1
Composite Higgs models can trivially satisfy precision-electroweak and flavour constraints by simply having a large spontaneous symmetry breaking scale, f > 10 TeV. This produces a…
Radiative corrections to the composite Higgs mass from a gluon partner
James Barnard, Tony Gherghetta, Anibal Medina +1
In composite Higgs models light fermionic top partners often play an important role in obtaining a 126 GeV Higgs mass. The presence of these top partners implies that coloured vect…