کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8194363 | 1528892 | 2009 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Sneutrino dark matter and the observed anomalies in cosmic rays
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We revisit sneutrino dark matter in light of the recent results from the PAMELA and ATIC experiments. In the U(1)BâL extension of the minimal supersymmetric standard model the right-handed sneutrino is a natural candidate for thermal dark matter. Sneutrino annihilation at the present time can be considerably enhanced due to the exchange of the lightest field in the Higgs sector that breaks U(1)BâL. The annihilation mainly produces taus (or muons) by the virtue of BâL charges. A sneutrino mass in the 1-2 TeV range provides a good fit to the PAMELA data and a reasonable fit to the ATIC data. Within this mass range the sneutrino-nucleon elastic scattering cross section is 10â11-10â9 pb, which might be probed by upcoming and future direct detection experiments. In addition, if (at least) one of the neutrinos is dominantly a Dirac fermion, the sneutrino can provide a unified picture of dark matter and inflation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 677, Issues 3â4, 22 June 2009, Pages 172-178
Journal: Physics Letters B - Volume 677, Issues 3â4, 22 June 2009, Pages 172-178
نویسندگان
Rouzbeh Allahverdi, Bhaskar Dutta, Katherine Richardson-McDaniel, Yudi Santoso,