scholarly journals Deformed shell model study of event rates for WIMP-73Ge scattering

2017 ◽  
Vol 32 (38) ◽  
pp. 1750210 ◽  
Author(s):  
R. Sahu ◽  
V. K. B. Kota
Keyword(s):  
Dark Matter ◽  
Inelastic Scattering ◽  
Shell Model ◽  
Energy Levels ◽  
Supersymmetric Model ◽  
Dark Matter Candidate ◽  
Detection Rates ◽  
Hartree Fock ◽  
Model Study ◽  
Event Rates

The event detection rates for the Weakly Interacting Massive Particles (WIMP) (a dark matter candidate) are calculated with [Formula: see text]Ge as the detector. The calculations are performed within the deformed shell model (DSM) based on Hartree–Fock states. First, the energy levels and magnetic moment for the ground state and two low-lying positive parity states for this nucleus are calculated and compared with experiment. The agreement is quite satisfactory. Then the nuclear wave functions are used to investigate the elastic and inelastic scattering of WIMP from [Formula: see text]Ge; inelastic scattering, especially for the [Formula: see text] transition, is studied for the first time. The nuclear structure factors which are independent of supersymmetric model are also calculated as a function of WIMP mass. The event rates are calculated for a given set of nucleonic current parameters. The calculation shows that [Formula: see text]Ge is a good detector for detecting dark matter.

scholarly journals Novel Neutrino-Floor and Dark Matter Searches with Deformed Shell Model Calculations

2018 ◽  
Vol 2018 ◽  
pp. 1-17 ◽  
Author(s):  
D. K. Papoulias ◽  
R. Sahu ◽  
T. S. Kosmas ◽  
V. K. B. Kota ◽  
B. Nayak
Keyword(s):  
Dark Matter ◽  
Shell Model ◽  
Particle Physics ◽  
Magnetic Moments ◽  
Form Factors ◽  
Detection Rates ◽  
Model Calculations ◽  
Hartree Fock ◽  
The Impact ◽  
Direct Dark Matter

Event detection rates for WIMP-nucleus interactions are calculated for  71Ga,  73Ge,  75As, and  127I (direct dark matter detectors). The nuclear structure form factors, which are rather independent of the underlying beyond the Standard Model particle physics scenario assumed, are evaluated within the context of the deformed nuclear shell model (DSM) based on Hartree-Fock nuclear states. Along with the previously published DSM results for  73Ge, the neutrino-floor due to coherent elastic neutrino-nucleus scattering (CEνNS), an important source of background to dark matter searches, is extensively calculated. The impact of new contributions to CEνNS due to neutrino magnetic moments and Z′ mediators at direct dark matter detection experiments is also examined and discussed. The results show that the neutrino-floor constitutes a crucial source of background events for multi-ton scale detectors with sub-keV capabilities.

Shell-model study ofS39(β−)39Cl and the energy levels ofCl39

1989 ◽  
Vol 40 (6) ◽  
pp. 2823-2833 ◽  
Author(s):  
E. K. Warburton ◽  
J. A. Becker
Keyword(s):  
Shell Model ◽  
Energy Levels ◽  
Model Study

scholarly journals Realistic Calculations for Cold Dark Matter Detection Rates

2020 ◽  
Vol 13 ◽  
pp. 283
Author(s):  
T. S. Kosmas ◽  
M. Kortelainen ◽  
J. Suhonen ◽  
J. Toivanen
Keyword(s):  
Dark Matter ◽  
Nuclear Structure ◽  
Large Scale ◽  
Cold Dark Matter ◽  
Scattering Problem ◽  
Realistic Model ◽  
Supersymmetric Particle ◽  
Detection Rates ◽  
Model Spaces ◽  
Event Rates

The scattering of the cold dark matter (CDM) candidate LSP (Lightest Supersymmetric Particle) off nuclei is investigated. We focus on the nuclear-structure aspects of the LSP-nucleus scattering problem and computed the associated event rates as well as the annual modulation signals for the 23Na, 71Ga, 73Ge and 127I CDM detectors by using the nuclear shell model in realistic model spaces and exploiting microscopic effective two-body interactions. Large-scale computations had to be performed in order to achieve convergence of the results. The relevance of the spin-dependent and coherent channels for the event rates is discussed, from both the nuclear structure and the SUSY-model viewpoints.

scholarly journals Shell-model study on event rates of lightest supersymmetric particles scattering offKr83andTe125

2016 ◽  
Vol 93 (9) ◽  
Author(s):  
P. Pirinen ◽  
P. C. Srivastava ◽  
J. Suhonen ◽  
M. Kortelainen
Keyword(s):  
Shell Model ◽  
Model Study ◽  
Supersymmetric Particles ◽  
Event Rates

scholarly journals DARK MATTER CANDIDATE IN A HEAVY HIGGS MODEL: DIRECT DETECTION RATES

2008 ◽  
Vol 23 (24) ◽  
pp. 2011-2022 ◽  
Author(s):  
DEBASISH MAJUMDAR ◽  
AMBAR GHOSAL
Keyword(s):  
Dark Matter ◽  
Higgs Boson ◽  
Cold Dark Matter ◽  
Direct Detection ◽  
Scalar Potential ◽  
Higgs Model ◽  
Boson Mass ◽  
Dark Matter Candidate ◽  
Detection Rates ◽  
200 Gev

We investigate direct detection rates for Dark Matter candidates arise in a SU (2)L× U (1)Y with an additional doublet Higgs proposed by Barbieri, Hall and Rychkov. We refer to this model as "Heavy Higgs Model". The Standard Model Higgs mass comes out from this model is very heavy, so there is very slim chance that there is no Higgs boson mass below 200 GeV. The additional Higgs boson develops neither any VEV due to the choice of coefficient of the scalar potential of the model nor it has any coupling with fermions due to the incorporation of a discrete parity symmetry. Thus, the neutral components of the extra doublet are stable and can be considered as probable candidate of Cold Dark Matter. We have made calculations for three different types of Dark Matter experiments, namely, 76 Ge (like GENIUS), DAMA (NaI) and XENON (131 Xe ). Also demonstrated the annual variation of Dark Matter detection in case of all three

scholarly journals Systematic shell-model study on spectroscopic properties from light to heavy nuclei

2018 ◽  
Vol 178 ◽  
pp. 02016
Author(s):  
Cenxi Yuan
Keyword(s):  
Shell Model ◽  
Energy Levels ◽  
Spectroscopic Properties ◽  
Energy Difference ◽  
Binding Energies ◽  
Electromagnetic Properties ◽  
Heavy Nuclei ◽  
Weakly Bound ◽  
Model Study ◽  
Special Case

A systematic shell-model study is performed to study the spectroscopic properties from light to heavy nuclei, such as binding energies, energy levels, electromagnetic properties, and β decays. The importance of cross-shell excitation is shown in the spectroscopic properties of neutron-rich boron, carbon, nitrogen, and oxygen isotopes. A special case is presented for low-lying structure of 14C. The weakly bound effect of proton 1s1/2 orbit is necessary for the description of the mirror energy difference in the nuclei around A=20. Some possible isomers are predicted in the nuclei in the southeast region of 132Sn based on a newly suggested Hamiltonian. A preliminary study on the nuclei around 208Pb are given to show the ability of the shell model in the heavy nuclei.

A light dark-matter candidate in an extended supersymmetric model

1991 ◽  
Vol 355 (1) ◽  
pp. 192-207 ◽  
Author(s):  
Keith A. Olive ◽  
David Thomas
Keyword(s):  
Dark Matter ◽  
Supersymmetric Model ◽  
Dark Matter Candidate

Shell model study ofS40(β−)40Cl and the energy levels ofCl40

1989 ◽  
Vol 39 (4) ◽  
pp. 1535-1543 ◽  
Author(s):  
E. K. Warburton ◽  
J. A. Becker
Keyword(s):  
Shell Model ◽  
Energy Levels ◽  
Model Study

scholarly journals The tiny (g-2) muon wobble from small-μ supersymmetry

2022 ◽  
Vol 2022 (1) ◽  
Author(s):  
Sebastian Baum ◽  
Marcela Carena ◽  
Nausheen R. Shah ◽  
Carlos E. M. Wagner
Keyword(s):  
Dark Matter ◽  
Direct Detection ◽  
Mass Parameter ◽  
New Physics ◽  
Higgs Bosons ◽  
Supersymmetric Model ◽  
Dark Matter Candidate ◽  
Muon Anomalous Magnetic Moment ◽  
The Standard Model ◽  
Direct Dark Matter

Abstract A new measurement of the muon anomalous magnetic moment, gμ− 2, has been reported by the Fermilab Muon g-2 collaboration and shows a 4.2 σ departure from the most precise and reliable calculation of this quantity in the Standard Model. Assuming that this discrepancy is due to new physics, we concentrate on a simple supersymmetric model that also provides a dark matter explanation in a previously unexplored region of supersymmetric parameter space. Such interesting region can realize a Bino-like dark matter candidate compatible with all current direct detection constraints for small to moderate values of the Higgsino mass parameter |μ|. This in turn would imply the existence of light additional Higgs bosons and Higgsino particles within reach of the high-luminosity LHC and future colliders. We provide benchmark scenarios that will be tested in the next generation of direct dark matter experiments and at the LHC.

scholarly journals Event Rates for the Scattering of Weakly Interacting Massive Particles from 23Na and 40Ar

Particles ◽  
2021 ◽  
Vol 4 (1) ◽  
pp. 75-92
Author(s):  
R. Sahu ◽  
V. K. B. Kota ◽  
T. S. Kosmas
Keyword(s):  
Nuclear Structure ◽  
Magnetic Moments ◽  
Spectroscopic Properties ◽  
Weakly Interacting Massive Particles ◽  
Detection Rates ◽  
Hartree Fock ◽  
Weakly Interacting ◽  
Massive Particles ◽  
Event Rates ◽  
Detector Materials

Detection rates for the elastic and inelastic scattering of weakly interacting massive particles (WIMPs) off 23Na are calculated within the framework of Deformed Shell Model (DSM) based on Hartree-Fock states. At first, the spectroscopic properties of the detector nucleus, like energy spectra and magnetic moments, are evaluated and compared with experimental data. Following the good agreement of these results, DSM wave functions are used for obtaining elastic and inelastic spin structure functions, nuclear structure coefficients and so forth for the WIMP-23Na scattering. Then, the event rates are also computed with a given set of supersymmetric parameters. In the same manner, using DSM wavefunctions, nuclear structure coefficients and event rates for elastic scattering of WIMPs from 40Ar are also obtained. These results for event rates and also for annual modulation will be useful for the ongoing and future WIMP detection experiments involving detector materials with 23Na and 40Ar nuclei.

Sign in / Sign up

Export Citation Format

Share Document