Xe同位素散射的中性电流中微子-核。
192 浏览量
2020-04-19
04:40:11
上传
评论
收藏 1.64MB PDF 举报
Research Article
Neutral-Current Neutrino-Nucleus Scattering off Xe Isotopes
P. Pirinen ,
1
J. Suhonen ,
1
and E. Ydrefors
2
1
University of Jyvaskyla, Department of Physics, P.O. Box 35, 40014, Finland
2
Instituto Tecnol
´
ogico de Aeron
´
autica, DCTA, 12228-900 S
˜
ao Jos
´
e dos Campos, Brazil
Correspondence should be addressed to P. Pirinen; pekka.a.pirinen@student.jyu.
Received 26 April 2018; Accepted 18 August 2018; Published 4 October 2018
Acad
emic Editor: Athanasios Hatzikoutelis
Copyright © P. Pirinen et al. is is an open access article distributed under the Creative Commons Attribution License,
which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. e
publication of this article was funded by SCOAP
.
Large liquid xenon detectors aiming for dark matter direct detection will soon become viable tools also for investigating neutrino
physics. Information on the eects of nuclear structure in neutrino-nucleus scattering can be important in distinguishing neutrino
backgrounds in such detectors. We perform calculations for dierential and total cross sections of neutral-current neutrino
scattering o the most abundant xenon isotopes. e nuclear-structure calculations are made in the nuclear shell model for
elastic scattering and also in the quasiparticle random-phase approximation (QRPA) and microscopic quasiparticle-phonon model
(MQPM) for both elastic and inelastic scattering. Using suitable neutrino energy distributions, we compute estimates of total
averaged cross sections for
8
B solar neutrinos and supernova neutrinos.
1. Introduction
When the idea of neutrinos was rst suggested by Pauli
in,itwasthoughtthattheywouldneverbeobserved
experimentally. Only two decades later interaction of neu-
trinos with matter was detected in the famous Cowan-
Reines experiment []. More recently, detection and research
of neutrinos have become more and more of an everyday
commodity, and various more versatile ways to examine
interactions of the little neutral one have emerged and are
being tested in laboratories all over the world.
Coherent elastic neutrino-nucleus scattering (CE]NS) is
a process where the neutrino interacts with the target nucleus
as a whole instead of a single nucleon. Although CE]NS
has been predicted since the s [], it was discovered
only very recently by the COHERENT collaboration [].
Due to the coherent enhancement, this experiment had the
remarkable feature of detecting neutrinos with a compact
. kg detector instead of a massive detector volume which
is used in conventional neutrino experiments. Coherent
neutrino-nucleus scattering is on one hand an important
potential source of information for beyond-standard-model
physics [–], but on the other hand it may also hinder new
discoveries as it will start disturbing dark matter detectors in
the near future.
A great experimental eort has been put into directly
detecting dark matter in the past few decades (see [] for
a review). e next-generation detectors are expected to
be sensitive enough to probe cross sections low enough
to start observing CE]NS as an irreducible background
[, ]. Solar neutrinos, atmospheric neutrinos, and diuse
supernova background neutrinos provide a natural source
of background neutrinos, which for obvious reasons cannot
be shielded against. As there are uncertainties in the uxes
of each of the aforementioned neutrino types, the sensitivity
of WIMP (weakly interacting massive particle) detection is
basically limited to the magnitude of this uncertainty. To
make matters worse, it has been shown that for some specic
WIMP masses and cross sections the recoil spectra of CE]NS
very closely mimic that of scattering WIMPs [].
It is therefore of utmost importance to devise a way to go
through this neutrino oor. One potential way of achieving
this is having directional sensitivity in the detector [, ]. As
solar and atmospheric neutrinos have a distinct source within
the solar system, it is expected that their recoil direction
would be dierent to that of WIMPs, which are typically
Hindawi
Advances in High Energy Physics
Volume 2018, Article ID 9163586, 11 pages
https://doi.org/10.1155/2018/9163586
剩余11页未读，继续阅读
资源评论
