scholarly journals DARK MATTER SEARCH AND THE SCALAR QUARK CONTENTS OF THE NUCLEON

2011 ◽  
Vol 20 (supp01) ◽  
pp. 110-117 ◽  
Author(s):  
SIMON DINTER ◽  
VINCENT DRACH ◽  
KARL JANSEN
Keyword(s):  
Dark Matter ◽  
Lattice Qcd ◽  
Cross Section ◽  
Charm Quark ◽  
Dark Matter Search ◽  
Mass Collaboration ◽  
Twisted Mass ◽  
Scalar Quark ◽  
Simulation Results ◽  
Quark Content

We present lattice QCD simulation results from the European Twisted Mass Collaboration (ETMC) for the light, strange and charm quark contents of the nucleon. These quantities are important ingredients to estimate the cross-section for the detection of WIMPs as Dark Matter candidates. By employing a particular lattice QCD formulation, i.e. twisted mass fermions, accurate results of the light and strange scalar contents of the nucleon can be obtained. In addition, we provide a bound for the charm quark content of the nucleon.

LIMITS ON THE WIMP-NUCLEON CROSS-SECTION FROM THE CRYOGENIC DARK MATTER SEARCH

COSMO-2000 ◽  
2001 ◽  
Author(s):  
R.W. SCHNEE ◽  
R. ABUSAIDI ◽  
D.S. AKERIB ◽  
P.D. BARNES ◽  
D.A. BAUER ◽  
...  
Keyword(s):  
Dark Matter ◽  
Cross Section ◽  
Dark Matter Search ◽  
Cryogenic Dark Matter Search ◽  
Cryogenic Dark Matter

scholarly journals First limits from a 3D-vector directional dark matter search with the NEWAGE-0.3b’ detector

2020 ◽  
Vol 2020 (11) ◽  
Author(s):  
Ryota Yakabe ◽  
Kiseki Nakamura ◽  
Tomonori Ikeda ◽  
Hiroshi Ito ◽  
Yushiro Yamaguchi ◽  
...  
Keyword(s):  
Dark Matter ◽  
Cross Section ◽  
Confidence Level ◽  
Three Dimensional ◽  
Underground Laboratory ◽  
Dark Matter Search ◽  
Upper Limit ◽  
Tracking Detector ◽  
Vector Tracking

Abstract The first directional dark matter search with three-dimensional tracking with head–tail sensitivity (3D-vector tracking analysis) was performed with a gaseous three-dimensional tracking detector, or the NEWAGE-0.3b’ detector. The search was carried out from 2013 July to 2017 August (Run14 to Run18) at the Kamioka underground laboratory. The total livetime is 434.85 d, corresponding to an exposure of 4.51 kg$\>$d. A 90 % confidence level upper limit on spin-dependent WIMP-proton cross-section of $4.3\times10^{2}$ pb for WIMPs with the mass of 150 GeV$\>c^{-2}$ is obtained.

Mass spectra of Ds meson from Nf = 2 twisted mass lattice QCD

2015 ◽  
Vol 30 (11) ◽  
pp. 1550060 ◽  
Author(s):  
Ning Li ◽  
Ya-Jie Wu
Keyword(s):  
Experimental Data ◽  
Lattice Qcd ◽  
Mass Spectra ◽  
Numerical Results ◽  
Mass Collaboration ◽  
Twisted Mass ◽  
Lattice Size ◽  
Ds Meson

In this paper, we study the mass spectra of Ds mesons, such as Ds, [Formula: see text] and Ds1. In the simulation, we use Nf = 2 twisted mass lattice QCD gauge configurations generated by the European Twisted Mass Collaboration (ETMC). The simulation is performed on lattices with lattice spacings a = 0.067 fm and lattice size 323×64, and a = 0.085 fm and lattice size 243×48, respectively. Our numerical results for the mass spectra of Ds mesons reached impressive agreement with the experimental data.

scholarly journals The Cryogenic Dark Matter Search (CDMS II) Experiment - First Results from the Soudan Mine

2005 ◽  
Vol 20 (14) ◽  
pp. 3132-3134
Author(s):  
◽  
Clarence L. Chang
Keyword(s):  
Dark Matter ◽  
Cross Section ◽  
Underground Laboratory ◽  
Data Sets ◽  
Dark Matter Search ◽  
Cryogenic Dark Matter Search ◽  
First Results ◽  
Cryogenic Dark Matter ◽  
Wimp Search

The CDMS collaboration has completed its first WIMP search run at the Soudan Underground Laboratory. This run consisted of operating 4 Ge and 2 Si ZIP detectors for 52.6 live days and yields a post-analysis WIMP exposure of 19.4 kg-d for recoil energies between 10-100 keV. Analysis of this data sets the world's lowest exclusion limits on the coherent WIMP-nucleon scalar cross-section for all WIMP masses above 15 GeV/c2.

scholarly journals Exclusion Limits on the WIMP-Nucleon Cross Section from the Cryogenic Dark Matter Search

2000 ◽  
Vol 84 (25) ◽  
pp. 5699-5703 ◽  
Author(s):  
R. Abusaidi ◽  
D. S. Akerib ◽  
P. D. Barnes ◽  
D. A. Bauer ◽  
A. Bolozdynya ◽  
...  
Keyword(s):  
Dark Matter ◽  
Cross Section ◽  
Dark Matter Search ◽  
Cryogenic Dark Matter Search ◽  
Cryogenic Dark Matter

scholarly journals Direction-sensitive dark matter search with a low-background gaseous detector NEWAGE-0.3b”

2021 ◽  
Author(s):  
Tomonori Ikeda ◽  
Kiseki Nakamura ◽  
Takuya Shimada ◽  
Ryota Yakabe ◽  
Takashi Hashimoto ◽  
...  
Keyword(s):  
Dark Matter ◽  
Cross Section ◽  
Confidence Level ◽  
Energy Region ◽  
Time Projection Chamber ◽  
Emission Rate ◽  
Dark Matter Search ◽  
Low Background ◽  
Upper Limit ◽  
Time Projection

Abstract NEWAGE is a direction-sensitive dark matter search using a low-pressure gaseous time projection chamber. A low alpha-ray emission rate micro pixel chamber had been developed in order to reduce background for dark matter search. We conducted the dark matter search at the Kamioka Observatory in 2018. The total live time was 107.6 days corresponding to an exposure of 1.1 kg⋅days. Two events remained in the energy region of 50-60 keV which was consistent with 2.5 events of the expected background. A directional analysis was carried out and no significant forward-backward asymmetry derived from the WIMP-nucleus elastic scatterings was found. Thus a 90% confidence level upper limit on Spin-Dependent WIMP-proton cross section of 50 pb for a WIMP mass of 100 GeV/c2 was derived. This limit is the most stringent yet obtained from direction-sensitive dark matter search experiments.

scholarly journals Constraints to Dark Matter Annihilation from High-Latitude HAWC Unidentified Sources

Galaxies ◽  
2019 ◽  
Vol 8 (1) ◽  
pp. 5
Author(s):  
Javier Coronado-Blázquez ◽  
Miguel A. Sánchez-Conde
Keyword(s):  
Dark Matter ◽  
Cross Section ◽  
Gamma Rays ◽  
High Latitude ◽  
Gamma Ray ◽  
Detection Threshold ◽  
Dark Matter Annihilation ◽  
Annihilation Channel ◽  
Dark Matter Search ◽  
Spatially Extended

The Λ CDM cosmological framework predicts the existence of thousands of subhalos in our own Galaxy not massive enough to retain baryons and become visible. Yet, some of them may outshine in gamma rays provided that the dark matter is made of weakly interacting massive particles (WIMPs), which would self-annihilate and would appear as unidentified gamma-ray sources (unIDs) in gamma-ray catalogs. Indeed, unIDs have proven to be competitive targets for dark matter searches with gamma rays. In this work, we focus on the three high-latitude ( | b | ≥ 10 ) sources present in the 2HWC catalog of the High Altitude Water Cherenkov (HAWC) observatory with no clear associations at other wavelengths. Indeed, only one of these sources, 2HWC J1040+308, is found to be above the HAWC detection threshold when considering 760 days of data, i.e., a factor 1.5 more exposure time than in the original 2HWC catalog. Other gamma-ray instruments, such as Fermi-LAT or VERITAS at lower energies, do not detect the source. Also, this unID is reported as spatially extended, making it even more interesting in a dark matter search context. While waiting for more data that may shed further light on the nature of this source, we set competitive upper limits on the annihilation cross section by comparing this HAWC unID to expectations based on state-of-the-art N-body cosmological simulations of the Galactic subhalo population. We find these constraints to be particularly competitive for heavy WIMPs, i.e., masses above ∼25 (40) TeV in the case of the b b ¯ ( τ + τ − ) annihilation channel, reaching velocity-averaged cross section values of 2 × 10 − 25 ( 5 × 10 − 25 ) cm 3 ·s − 1 . Although far from testing the thermal relic cross section value, the obtained limits are independent and nicely complementary to those from radically different DM analyses and targets, demonstrating once again the high potential of this DM search approach.

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