Thermal abundance of non-relativistic relics with Sommerfeld enhancement

Hoernisa Iminniyaz; Mitsuru Kakizaki

doi:10.1016/j.nuclphysb.2011.05.009

Thermal abundance of non-relativistic relics with Sommerfeld enhancement

Hoernisa Iminniyaz^*, Mitsuru Kakizaki

^*この論文の責任著者

物理学科

研究成果: ジャーナルへの寄稿 › 学術論文 › 査読

8 被引用数 (Scopus)

抄録

We propose an analytic treatment for computing the relic abundances of non-relativistic particles whose annihilation rate at chemical decoupling is increased by Sommerfeld enhancement. We find approximate rational functions that closely fit the thermal average of Sommerfeld-enhanced cross sections in the massless limit of force carriers for s- and p-wave annihilations. We demonstrate that, with the approximate thermally-averaged cross sections implemented, the standard analytic method for the final relic abundances provides accuracy to within 1% even for the case of Sommerfeld enhancement.

本文言語	英語
ページ（範囲）	57-65
ページ数	9
ジャーナル	Nuclear Physics B
巻	851
号	1
DOI	https://doi.org/10.1016/j.nuclphysb.2011.05.009
出版ステータス	出版済み - 2011/10/01

ASJC Scopus 主題領域

核物理学および高エネルギー物理学

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10.1016/j.nuclphysb.2011.05.009

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title = "Thermal abundance of non-relativistic relics with Sommerfeld enhancement",

abstract = "We propose an analytic treatment for computing the relic abundances of non-relativistic particles whose annihilation rate at chemical decoupling is increased by Sommerfeld enhancement. We find approximate rational functions that closely fit the thermal average of Sommerfeld-enhanced cross sections in the massless limit of force carriers for s- and p-wave annihilations. We demonstrate that, with the approximate thermally-averaged cross sections implemented, the standard analytic method for the final relic abundances provides accuracy to within 1% even for the case of Sommerfeld enhancement.",

author = "Hoernisa Iminniyaz and Mitsuru Kakizaki",

note = "Funding Information: The work of M.K. was partially supported by the Marie Curie Training Research “HEPTools” under contract No. MRTN-CT-2006-035505 . The work of H.I. is supported by the National Natural Science Foundation of China ( 11047009 ) and by the doctor fund BS100108 of Xinjiang university . H.I. also thanks to the hospitality and support of LAPTH , Annecy , during the completion of this work.",

year = "2011",

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doi = "10.1016/j.nuclphysb.2011.05.009",

language = "英語",

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T1 - Thermal abundance of non-relativistic relics with Sommerfeld enhancement

AU - Iminniyaz, Hoernisa

AU - Kakizaki, Mitsuru

N1 - Funding Information: The work of M.K. was partially supported by the Marie Curie Training Research “HEPTools” under contract No. MRTN-CT-2006-035505 . The work of H.I. is supported by the National Natural Science Foundation of China ( 11047009 ) and by the doctor fund BS100108 of Xinjiang university . H.I. also thanks to the hospitality and support of LAPTH , Annecy , during the completion of this work.

PY - 2011/10/1

Y1 - 2011/10/1

N2 - We propose an analytic treatment for computing the relic abundances of non-relativistic particles whose annihilation rate at chemical decoupling is increased by Sommerfeld enhancement. We find approximate rational functions that closely fit the thermal average of Sommerfeld-enhanced cross sections in the massless limit of force carriers for s- and p-wave annihilations. We demonstrate that, with the approximate thermally-averaged cross sections implemented, the standard analytic method for the final relic abundances provides accuracy to within 1% even for the case of Sommerfeld enhancement.

AB - We propose an analytic treatment for computing the relic abundances of non-relativistic particles whose annihilation rate at chemical decoupling is increased by Sommerfeld enhancement. We find approximate rational functions that closely fit the thermal average of Sommerfeld-enhanced cross sections in the massless limit of force carriers for s- and p-wave annihilations. We demonstrate that, with the approximate thermally-averaged cross sections implemented, the standard analytic method for the final relic abundances provides accuracy to within 1% even for the case of Sommerfeld enhancement.

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U2 - 10.1016/j.nuclphysb.2011.05.009

DO - 10.1016/j.nuclphysb.2011.05.009

M3 - 学術論文

AN - SCOPUS:79959599668

SN - 0550-3213

VL - 851

SP - 57

EP - 65

JO - Nuclear Physics B

JF - Nuclear Physics B

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ER -

Thermal abundance of non-relativistic relics with Sommerfeld enhancement

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