کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1843521 | 1527776 | 2009 | 18 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
White dwarf axions, PAMELA data, and flipped-SU(5)
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
ریاضیات
فیزیک ریاضی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Recently, there are two hints arising from physics beyond the standard model. One is a possible energy loss mechanism due to emission of very weakly interacting light particles from white dwarf stars, with a coupling strength â¼0.7Ã10â13, and another is the high energy positrons observed by the PAMELA satellite experiment. We construct a supersymmetric flipped-SU(5) model, SU(5)ÃU(1)X with appropriate additional symmetries, [U(1)H]gaugeÃ[U(1)RÃU(1)Î]globalÃZ2, such that these are explained by a very light electrophilic axion of mass 0.5 meV from the spontaneously broken U(1)Î and two component cold dark matters from Z2 parity. We show that in the flipped-SU(5) there exists a basic mechanism for allowing excess positrons through the charged SU(5) singlet leptons, but not allowing antiproton excess due to the absence of the SU(5) singlet quarks. We show the discovery potential of the charged SU(5) singlet E at the LHC experiments by observing the electron and positron spectrum. With these symmetries, we also comment on the mass hierarchy between the top and bottom quarks.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Physics B - Volume 817, Issues 1â2, 11 August 2009, Pages 58-75
Journal: Nuclear Physics B - Volume 817, Issues 1â2, 11 August 2009, Pages 58-75
نویسندگان
Kyu Jung Bae, Ji-Haeng Huh, Jihn E. Kim, Bumseok Kyae, Raoul D. Viollier,