scholarly journals First demonstration of a sub-keV electron recoil energy threshold in a liquid argon ionization chamber

2013 ◽  
Vol 728 ◽  
pp. 69-72 ◽  
Author(s):  
S. Sangiorgio ◽  
T.H. Joshi ◽  
A. Bernstein ◽  
J. Coleman ◽  
M. Foxe ◽  
...  
Keyword(s):  
Ionization Chamber ◽  
Liquid Argon ◽  
Energy Threshold ◽  
Recoil Energy ◽  
Electron Recoil

scholarly journals First demonstration of a sub-keV electron recoil energy threshold in a liquid argon ionization chamber

2013 ◽  
Author(s):  
S Sangiorgio ◽  
A Bernstein ◽  
J Colomean ◽  
M Foxe ◽  
C Hagmann ◽  
...  
Keyword(s):  
Ionization Chamber ◽  
Liquid Argon ◽  
Energy Threshold ◽  
Recoil Energy ◽  
Electron Recoil

scholarly journals Exothermic dark matter for XENON1T excess

2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
Hyun Min Lee
Keyword(s):  
Dark Matter ◽  
Mass Difference ◽  
Mass Splitting ◽  
Effective Theory ◽  
Recoil Energy ◽  
Detector Resolution ◽  
Atomic Excitation ◽  
Microscopic Models ◽  
Electron Recoil ◽  
Two Component

Abstract Motivated by the recent excess in the electron recoil from XENON1T experiment, we consider the possibility of exothermic dark matter, which is composed of two states with mass splitting. The heavier state down-scatters off the electron into the lighter state, making an appropriate recoil energy required for the Xenon excess even for the standard Maxwellian velocity distribution of dark matter. Accordingly, we determine the mass difference between two component states of dark matter to the peak electron recoil energy at about 2.5 keV up to the detector resolution, accounting for the recoil events over ER = 2 − 3 keV, which are most significant. We include the effects of the phase-space enhancement and the atomic excitation factor to calculate the required scattering cross section for the Xenon excess. We discuss the implications of dark matter interactions in the effective theory for exothermic dark matter and a massive Z′ mediator and provide microscopic models realizing the required dark matter and electron couplings to Z′.

Search for double beta decay of 100Mo and 116Cd with a liquid argon ionization chamber (present status)

1994 ◽  
Vol 35 ◽  
pp. 384-385 ◽  
Author(s):  
A.S. Barabash ◽  
G. Carugno ◽  
S.I. Konovalov ◽  
P.A. Polozov ◽  
R.R. Saakyan ◽  
...  
Keyword(s):  
Beta Decay ◽  
Present Status ◽  
Ionization Chamber ◽  
Liquid Argon ◽  
Double Beta Decay

An Allene-Doped Liquid Argon Ionization Chamber for O and Ne Ions at 100 MeV/n

1999 ◽  
Vol 38 (Part 1, No. 11) ◽  
pp. 6491-6497 ◽  
Author(s):  
Akira Yunoki ◽  
Tadayoshi Doke ◽  
Masayuki Kase ◽  
Toshisuke Kashiwagi ◽  
Toshiyuki Kato ◽  
...  
Keyword(s):  
Ionization Chamber ◽  
Liquid Argon

Production and transport of conduction electrons in a liquid argon ionization chamber

1976 ◽  
Vol 135 (1) ◽  
pp. 151-156 ◽  
Author(s):  
W. Hofmann ◽  
U. Klein ◽  
M. Schulz ◽  
J. Spengler ◽  
D. Wegener
Keyword(s):  
Ionization Chamber ◽  
Liquid Argon ◽  
Conduction Electrons

High energy resolution liquid-argon ionization chamber with a 4.5 cm wide gap

1979 ◽  
Vol 166 (2) ◽  
pp. 169-170 ◽  
Author(s):  
A.S. Barabash ◽  
A.A. Golubev ◽  
O.V. Kazachenko ◽  
B.M. Ovchinnikov
Keyword(s):  
Energy Resolution ◽  
Ionization Chamber ◽  
Liquid Argon ◽  
High Energy ◽  
High Energy Resolution ◽  
Wide Gap

Search for double beta decay of 100Mo with liquid argon ionization chamber (first results)

1999 ◽  
Vol 70 (1-3) ◽  
pp. 233-235 ◽  
Author(s):  
V.D. Ashitkov ◽  
A.S. Barabash ◽  
S.G. Belogurov ◽  
G. Carugno ◽  
S.I. Konovalov ◽  
...  
Keyword(s):  
Beta Decay ◽  
Ionization Chamber ◽  
Liquid Argon ◽  
Double Beta Decay ◽  
First Results

scholarly journals Cosmological constraint on vector mediator of neutrino-electron interaction in light of XENON1T excess

2020 ◽  
Vol 2020 (12) ◽  
Author(s):  
Masahiro Ibe ◽  
Shin Kobayashi ◽  
Yuhei Nakayama ◽  
Satoshi Shirai
Keyword(s):  
Energy Spectrum ◽  
New Physics ◽  
Recoil Energy ◽  
Electron Interaction ◽  
Vector Particle ◽  
Effective Number ◽  
Parameter Region ◽  
Light Vector ◽  
Electron Recoil ◽  
Cosmological Constraint

Abstract Recently, the XENON1T collaboration reported an excess in the electron recoil energy spectrum. One of the simplest new physics interpretation is a new neutrino-electron interaction mediated by a light vector particle. However, for the parameter region favored by this excess, the constraints from the stellar cooling are severe. Still, there are astrophysical uncertainties on those constraints. In this paper, we discuss the constraint on the light mediator from the effective number of neutrino Neff in the CMB era, which provides an independent constraint. We show that Neff is significantly enhanced and exceeds the current constraint in the parameter region favored for the XENON1T excess. As a result, the interpretation by a light mediator heavier than about 1 eV is excluded by the Neff constraint.

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