Rik Bhattacharyya

Rik Bhattacharyya
Texas A&M University | TAMU · Department of Physics and Astronomy

Graduate Research Scholar | Texas A&M University (TAMU)

About

24
Publications
2,133
Reads
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287
Citations
Citations since 2017
23 Research Items
291 Citations
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2017201820192020202120222023020406080100120140
2017201820192020202120222023020406080100120140
Introduction
Rik Bhattacharyya currently works at the Mitchell Institute for Fundamental Physics and Astronomy, Texas A&M University, USA.
Education
August 2019 - May 2024
Texas A&M University
Field of study
  • Physics
July 2016 - June 2019
June 2013 - June 2016

Publications

Publications (24)
Article
Full-text available
Many low-threshold experiments observe sharply rising event rates of yet unknown origins below a few hundred eV, and larger than expected from known backgrounds. Due to the significant impact of this excess on the dark matter or neutrino sensitivity of these experiments, a collective effort has been started to share the knowledge about the individu...
Article
Full-text available
Two photo-neutron sources, Y88Be9 and Sb124Be9, have been used to investigate the ionization yield of nuclear recoils in the CDMSlite germanium detectors by the SuperCDMS collaboration. This work evaluates the yield for nuclear recoil energies between 1 and 7 keV at a temperature of ∼ 50 mK. We use a geant4 simulation to model the neutron spectrum...
Preprint
Full-text available
CDMSlite Run 2 was a search for weakly interacting massive particles (WIMPs) with a cryogenic 600 g Ge detector operated in a high-voltage mode to optimize sensitivity to WIMPs of relatively low mass from 2 - 20 GeV/$c^2$. In this article, we present an effective field theory (EFT) analysis of the CDMSlite Run 2 data using an extended energy range...
Preprint
Full-text available
Recent experiments searching for sub-GeV/$c^2$ dark matter have observed event excesses close to their respective energy thresholds. Although specific to the individual technologies, the measured excess event rates have been consistently reported at or below event energies of a few-hundred eV, or with charges of a few electron-hole pairs. In the pr...
Preprint
Full-text available
The SuperCDMS Collaboration is currently building SuperCDMS SNOLAB, a dark matter search focused on nucleon-coupled dark matter in the 1-5 GeV mass range. Looking to the future, the Collaboration has developed a set of experience-based upgrade scenarios, as well as novel directions, to extend the search for dark matter using the SuperCDMS technolog...
Preprint
Full-text available
Two photo-neutron sources, $^{88}$Y$^{9}$Be and $^{124}$Sb$^{9}$Be, have been used to investigate the ionization yield of nuclear recoils in the CDMSlite germanium detectors by the SuperCDMS collaboration. This work evaluates the yield for nuclear recoil energies between 1 keV and 7 keV at a temperature of $\sim$ 50 mK. We use a Geant4 simulation t...
Preprint
Full-text available
Many low-threshold experiments observe sharply rising event rates of yet unknown origins below a few hundred eV, and larger than expected from known backgrounds. Due to the significant impact of this excess on the dark matter or neutrino sensitivity of these experiments, a collective effort has been started to share the knowledge about the individu...
Preprint
Full-text available
Many low-threshold experiments observe sharply rising event rates of yet unknown origins below a few hundred eV, and larger than expected from known backgrounds. Due to the significant impact of this excess on the dark matter or neutrino sensitivity of these experiments , a collective effort has been started to share the knowledge about the individ...
Article
Full-text available
The Cryogenic Dark Matter Search low ionization threshold experiment (CDMSlite) achieved efficient detection of very small recoil energies in its germanium target, resulting in sensitivity to lightly ionizing particles (LIPs) in a previously unexplored region of charge, mass, and velocity parameter space. We report first direct-detection limits cal...
Article
Full-text available
The Cryogenic Dark Matter Search low ionization threshold experiment (CDMSlite) achieved efficient detection of very small recoil energies in its germanium target, resulting in sensitivity to lightly ionizing particles (LIPs) in a previously unexplored region of charge, mass, and velocity parameter space. We report first direct-detection limits cal...
Article
Full-text available
We present limits on spin-independent dark matter-nucleon interactions using a 10.6 g Si athermal phonon detector with a baseline energy resolution of σE=3.86±0.04(stat)−0.00+0.19(syst) eV. This exclusion analysis sets the most stringent dark matter-nucleon scattering cross-section limits achieved by a cryogenic detector for dark matter particle ma...
Preprint
Full-text available
The Cryogenic Dark Matter Search low ionization threshold experiment (CDMSlite) achieved efficient detection of very small recoil energies in its germanium target, resulting in sensitivity to Lightly Ionizing Particles (LIPs) in a previously unexplored region of charge, mass, and velocity parameter space. We report first direct-detection limits on...
Article
Full-text available
This article presents an analysis and the resulting limits on light dark matter inelastically scattering off of electrons, and on dark photon and axionlike particle absorption, using a second-generation SuperCDMS high-voltage eV-resolution detector. The 0.93 g Si detector achieved a 3 eV phonon energy resolution; for a detector bias of 100 V, this...
Preprint
Full-text available
We present limits on spin-independent dark matter-nucleon interactions using a $10.6$ $\mathrm{g}$ Si athermal phonon detector with a baseline energy resolution of $\sigma_E=4.92 \pm 0.01$ $\mathrm{eV}$. This exclusion analysis sets the most stringent dark matter-nucleon scattering cross-section limits for dark matter particle masses from $87$ to $...
Preprint
Full-text available
This article presents an analysis and the resulting limits on light dark matter inelastically scattering off of electrons, and on dark photon and axion-like particle absorption, using a second-generation SuperCDMS high-voltage eV-resolution detector. The 0.93 gram Si detector achieved a 3 eV phonon energy resolution; for a detector bias of 100 V, t...
Article
Full-text available
We present an analysis of electron recoils in cryogenic germanium detectors operated during the SuperCDMS Soudan experiment. The data are used to set new constraints on the axioelectric coupling of axionlike particles and the kinetic mixing parameter of dark photons, assuming the respective species constitutes all of the galactic dark matter. This...
Preprint
Full-text available
We present an analysis of electron recoils in cryogenic germanium detectors operated during the SuperCDMS Soudan experiment. The data are used to set new constraints on the axioelectric coupling of axion-like particles and the kinetic mixing parameter of dark photons, assuming the respective species constitutes all of the galactic dark matter. This...
Thesis
Almost 27% of our Universe comprises invisible matter known as dark matter, which does not interact with electromagnetic radiation. We know their existence, but they are yet to be discovered. The Cryogenic Dark Matter Search (CDMS) is one of the world-leading direct dark matter search experiment aiming to measure the nuclear recoil energy for a dar...
Research
Stellar structure equations can be put in a single equation for a spherically symmetric white dwarf called Lane- Emden equation. Numerical solution of this equation gives me the maximum mass of a white dwarf i.e. 1.436 M_\dot . This is the famous Chandrasekhar Mass limit for the white dwarf. Many recent observations from Type Ia Supernovae violate...
Research
Full-text available
Breskin detector is a modified MWPC, which has two position sensing plates like a cross-grid, unlike normal MWPC which has one position detection plates. The advantage of this type of detector is that one can measure the particle trajectory in more accurate by using the information of particle’s positions (x,y coordinates) and time (delay line chip...

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Projects

Project (1)
Project
Our Universe consists of almost 27% Dark Mater (DM). SuperCDMS is a direct WIMP search experiment. It measures the nuclear recoil energy for a DM-nucleon elastic scattering process. I am focussing on the backgrounds in this experiment.