Overcoming velocity suppression in dark-matter direct-detection experiments

Keith R Dienes, Jason Kumar, Brooks Thomas, David Yaylali

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Pseudoscalar couplings between Standard-Model quarks and dark matter are normally not considered relevant for dark-matter direct-detection experiments because they lead to velocity-suppressed scattering cross sections in the nonrelativistic limit. However, at the nucleon level, such couplings are effectively enhanced by factors of order O(mN/mq)∼103, where mN and mq are appropriate nucleon and quark masses, respectively. This enhancement can thus be sufficient to overcome the corresponding velocity suppression, implying - contrary to common lore - that direct-detection experiments can indeed be sensitive to pseudoscalar couplings. In this work, we explain how this enhancement arises, and present a model-independent analysis of pseudoscalar interactions at direct-detection experiments. We also identify those portions of the corresponding dark-matter parameter space which can be probed at current and future experiments of this type, and discuss the role of isospin violation in enhancing the corresponding experimental reach.

Original languageEnglish (US)
Article number015012
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume90
Issue number1
DOIs
StatePublished - Jul 11 2014

Fingerprint

dark matter
retarding
quarks
augmentation
scattering cross sections
interactions

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Overcoming velocity suppression in dark-matter direct-detection experiments. / Dienes, Keith R; Kumar, Jason; Thomas, Brooks; Yaylali, David.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 90, No. 1, 015012, 11.07.2014.

Research output: Contribution to journalArticle

@article{b6655d5af2eb4229be5adb98bcc7cd58,
title = "Overcoming velocity suppression in dark-matter direct-detection experiments",
abstract = "Pseudoscalar couplings between Standard-Model quarks and dark matter are normally not considered relevant for dark-matter direct-detection experiments because they lead to velocity-suppressed scattering cross sections in the nonrelativistic limit. However, at the nucleon level, such couplings are effectively enhanced by factors of order O(mN/mq)∼103, where mN and mq are appropriate nucleon and quark masses, respectively. This enhancement can thus be sufficient to overcome the corresponding velocity suppression, implying - contrary to common lore - that direct-detection experiments can indeed be sensitive to pseudoscalar couplings. In this work, we explain how this enhancement arises, and present a model-independent analysis of pseudoscalar interactions at direct-detection experiments. We also identify those portions of the corresponding dark-matter parameter space which can be probed at current and future experiments of this type, and discuss the role of isospin violation in enhancing the corresponding experimental reach.",
author = "Dienes, {Keith R} and Jason Kumar and Brooks Thomas and David Yaylali",
year = "2014",
month = "7",
day = "11",
doi = "10.1103/PhysRevD.90.015012",
language = "English (US)",
volume = "90",
journal = "Physical review D: Particles and fields",
issn = "0556-2821",
publisher = "American Institute of Physics",
number = "1",

}

TY - JOUR

T1 - Overcoming velocity suppression in dark-matter direct-detection experiments

AU - Dienes, Keith R

AU - Kumar, Jason

AU - Thomas, Brooks

AU - Yaylali, David

PY - 2014/7/11

Y1 - 2014/7/11

N2 - Pseudoscalar couplings between Standard-Model quarks and dark matter are normally not considered relevant for dark-matter direct-detection experiments because they lead to velocity-suppressed scattering cross sections in the nonrelativistic limit. However, at the nucleon level, such couplings are effectively enhanced by factors of order O(mN/mq)∼103, where mN and mq are appropriate nucleon and quark masses, respectively. This enhancement can thus be sufficient to overcome the corresponding velocity suppression, implying - contrary to common lore - that direct-detection experiments can indeed be sensitive to pseudoscalar couplings. In this work, we explain how this enhancement arises, and present a model-independent analysis of pseudoscalar interactions at direct-detection experiments. We also identify those portions of the corresponding dark-matter parameter space which can be probed at current and future experiments of this type, and discuss the role of isospin violation in enhancing the corresponding experimental reach.

AB - Pseudoscalar couplings between Standard-Model quarks and dark matter are normally not considered relevant for dark-matter direct-detection experiments because they lead to velocity-suppressed scattering cross sections in the nonrelativistic limit. However, at the nucleon level, such couplings are effectively enhanced by factors of order O(mN/mq)∼103, where mN and mq are appropriate nucleon and quark masses, respectively. This enhancement can thus be sufficient to overcome the corresponding velocity suppression, implying - contrary to common lore - that direct-detection experiments can indeed be sensitive to pseudoscalar couplings. In this work, we explain how this enhancement arises, and present a model-independent analysis of pseudoscalar interactions at direct-detection experiments. We also identify those portions of the corresponding dark-matter parameter space which can be probed at current and future experiments of this type, and discuss the role of isospin violation in enhancing the corresponding experimental reach.

UR - http://www.scopus.com/inward/record.url?scp=84904365263&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84904365263&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.90.015012

DO - 10.1103/PhysRevD.90.015012

M3 - Article

VL - 90

JO - Physical review D: Particles and fields

JF - Physical review D: Particles and fields

SN - 0556-2821

IS - 1

M1 - 015012

ER -