Anapole moment of the lightest neutralino in the cMSSM

详细信息    查看全文

• 作者：Luis G. Cabral-Rosetti^a ; ^{cabralrosetti@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; Myriam Mondragó ; n^b ; ^{myriam@fisica.unam.mx" class="auth_mail" title="E-mail the corresponding author} ; Esteban Reyes-Pé ; rez^b ; ^{esteban.reyesperez@gmail.com" class="auth_mail" title="E-mail the corresponding author}
• 刊名：Nuclear Physics B
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：907
• 期：Complete
• 页码：1-17
• 全文大小：2534 K

文摘

We study the anapole moment of the lightest neutralino in the constrained Minimal Supersymmetric Standard Model (cMSSM). The electromagnetic anapole is the only allowed electromagnetic form factor for Majorana fermions, such as the neutralino. Since the neutralino is the LSP in many versions of the MSSM and therefore a candidate for dark matter, its characterization through its electromagnetic properties is important both for particle physics and for cosmology. We perform a scan in the parameter space of the cMSSM and find that the anapole moment is different from zero albeit very small (md5=df7ce63fd273401c68171abe36a2620d" title="Click to view the MathML source"><10⁻³ GeV⁻²$<{10}^{-3}{\text{GeV}}^{-2}$). Combined with experimental constraints like the Higgs mass and the DM relic density, the allowed region of parameter space lies within the reach of future direct DM searches. Thus, the anapole moment could be used as a complementary constraint when studying the parameter space of the cMSSM and other similar models.