69 citations · 626 across the 34 of their papers we have counts for
25 papers · 1 filter
Hilbert Series of Pseudoscalar Mesons: Operators and Sum Rules
Joydeep Chakrabortty, Sabyasachi Chakraborty, Siddhartha Karmakar
We construct the complete non-redundant basis of operators built from pseudoscalar mesons using the Hilbert series method, subject to the global flavor symmetry $SU(3)_L \times SU(…
A Phenomenological Model of Mesons for Charged Current Weak Decays
Sabyasachi Chakraborty, Namit Mahajan, Tuhin S. Roy
We propose a phenomenological model of pseudo scalar mesons to describe charged-current weak decays of heavy-light mesons. The approach combines chiral symmetry in the light sector…
Anomaly induced cooling of Neutron Stars: A Standard Model contribution
Sabyasachi Chakraborty, Aritra Gupta, Miguel Vanvlasselaer
Young neutron stars cool via the emission of neutrinos from their core. A precise understanding of all the different processes producing neutrinos in the hot and degenerate matter…
Ultra-relativistic bubbles from the simplest Higgs portal and their cosmological consequences
Aleksandr Azatov, Giulio Barni, Sabyasachi Chakraborty +2
We analyze the phase transitions in the minimal extension of the SM with a real singlet scalar field. The novelty of our study is that we identify and analyze in details the region…
Displaced Searches for Light Vector Bosons at Belle II
Triparno Bandyopadhyay, Sabyasachi Chakraborty, Sokratis Trifinopoulos
With a design luminosity of 50 ab and detectors with tracking capabilities extending beyond 1 m, the Belle II experiment is the perfect laboratory for the search of particle…
Heavy QCD Axion at Belle II: Displaced and Prompt Signals
Emilie Bertholet, Sabyasachi Chakraborty, Vazha Loladze +3
The QCD axion is a well-motivated addition to the standard model to solve the strong problem. If the axion acquires mass dominantly from a hidden sector, it can be as heavy…
Composite neutrinos and the QCD axion: baryogenesis, dark matter, small Dirac neutrino masses, and vanishing neutron EDM
Sabyasachi Chakraborty, Tae Hyun Jung, Takemichi Okui
We consider a chiral gauge theory from which light composite Dirac neutrinos dynamically emerge, augmented by a QCD axion to solve the strong CP problem. We show that an interplay…
Heavy QCD Axion in transition: Enhanced Limits and Projections
Sabyasachi Chakraborty, Manfred Kraus, Vazha Loladze +2
We study a "heavy" QCD axion whose coupling to the standard model is dominated by but with . This is well motivated as it can solve the str…
A solar origin of the XENON1T excess without stellar cooling problems
Sabyasachi Chakraborty, Tae Hyun Jung, Vazha Loladze +2
Solar interpretations of the recent XENON1T excess events, such as axion or dark photon emissions from the sun, are thought to be at odds with stellar cooling bounds from the horiz…
A radiatively generated source of flavor universal scalar soft masses
Sabyasachi Chakraborty, Tuhin S. Roy
We report that models of electroweak supersymmetry with gaugino mass unification and sequestered scalar masses can still produce viable spectra, as long as we include a set of non-…
Fat Jet Signature of a Heavy Neutrino at Lepton Collider
Sabyasachi Chakraborty, Manimala Mitra, Sujay Shil
We explore the discovery prospect of a very heavy neutrino at the proposed collider for two different c.m.energies TeV and 3 TeV. We consider production of…
Charting generalized supersoft supersymmetry
Sabyasachi Chakraborty, Adam Martin, Tuhin S. Roy
Without any shred of evidence for new physics from LHC, the last hiding spots of natural electroweak supersymmetry seem to lie either in compressed spectra or in spectra where scal…
Constraining compressed versions of MUED and MSSM using soft tracks at the LHC
Sabyasachi Chakraborty, Saurabh Niyogi, K. Sridhar
A compressed spectrum is an anticipated hideout for many beyond standard model scenarios. Such a spectrum naturally arises in the minimal universal extra dimension framework and al…
Addressing and neutrino mixing in a class of models
Disha Bhatia, Sabyasachi Chakraborty, Amol Dighe
We present a class of minimal models as a plausible solution to the anomaly that can also help reproduce the neutrino mixing pattern. The symmetries and the correspo…
Neutrino mixing and anomaly in models: a bottom-up approach
Disha Bhatia, Sabyasachi Chakraborty, Amol Dighe
We identify a class of models which can explain the anomaly and the neutrino mixing pattern, by using a bottom-up approach. The different -charges of lepton gener…
Natural emergence of neutrino masses and dark matter from -symmetry
Sabyasachi Chakraborty, Joydeep Chakrabortty
We propose a supersymmetric extension of the Standard Model (SM) with a continuous global symmetry. The -charges of the SM fields are identified with that of their lept…
Chasing New Physics in Stacks of Soft Tracks
Amit Chakraborty, Sabyasachi Chakraborty, Tuhin S. Roy
In this letter we introduce a new variable , namely the number of tracks associated with the primary vertex, which are not parts of reconstructed objects such as jets/isolated l…
Diphoton resonance at 750 GeV in the broken MRSSM
Sabyasachi Chakraborty, Amit Chakraborty, Sreerup Raychaudhuri
Non-observation of superpartners of the Standard Model particles at the early runs of the LHC provide strong motivation for an -symmetric minimal supersymmetric Standard Model,…
Probing at the LHC in the paradigm of R-parity violating MSSM
Amit Chakraborty, Sabyasachi Chakraborty
The measurement of the anomalous magnetic moment of the muon exhibits a long standing discrepancy compared to the Standard model prediction. In this paper, we concentrate on this i…
Light top squarks in -lepton number model with a right handed neutrino and the LHC
Sabyasachi Chakraborty, AseshKrishna Datta, Katri Huitu +2
We investigate the phenomenology of top squarks at the Large Hadron Collider (LHC) in a supersymmetric model where lepton number is identified with an approximate symmetry…
Lepton flavour violating decay of 125 GeV Higgs boson to channel and excess in
Biplob Bhattacherjee, Sabyasachi Chakraborty, Swagata Mukherjee
A recent search for the lepton flavor violating (LFV) decays of the Higgs boson, performed by CMS collaboration, reports an interesting deviation from the standard model (SM). The…
in lepton number model with a right-handed neutrino
Sabyasachi Chakraborty, AseshKrishna Datta, Sourov Roy
We perform a detailed study of the signal rate of the lightest Higgs boson in the diphoton channel (), recently analyzed by both the ATLAS and CMS collaborations at the Lar…
7 keV Sterile neutrino dark matter in lepton number model
Sabyasachi Chakraborty, Dilip Kumar Ghosh, Sourov Roy
We study the phenomenology of a keV sterile neutrino in a supersymmetric model with lepton number in the light of a very recent observation of an X-ray line signal at aro…
Higgs boson mass, neutrino masses and mixing and keV dark matter in an lepton number model
Sabyasachi Chakraborty, Sourov Roy
We discuss neutrino masses and mixing in the framework of a supersymmetric model with an symmetry, consisting of a single right handed neutrino superfield with an approp…