Implication of the PAMELA antiproton data for dark matter indirect detection at LHC - High Energy Physics - PhenomenologyReportar como inadecuado




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Abstract: Since the PAMELA results on the -anomalously- high positron fraction and thelack of antiproton excess in our Galaxy, there has been a tremendous number ofstudies advocating new types of dark matter, with larger couplings to electronsthan to quarks.This raises the question of the production of dark matter particles andheavy associated coloured states at LHC. Here, we explore a very simplebenchmark dark matter model and show that, in spite of the agreement betweenthe PAMELA antiproton measurements and the expected astrophysical secondarybackground, there is room for large couplings of a WIMP candidate to heavyquarks. Contrary to what could have been naively anticipated, the PAMELA pbar-pmeasurements do not challenge dark matter model building, as far as the quarksector is concerned. A quarkophillic species is therefore not forbidden.Owingto these large couplings, one would expect that a new production channel opensup at the LHC, through quark-quark and quark-gluon interactions. Alas, whenthe PDF of the quark is taken into account, prospects for a copious productionfade away.



Autor: Celine Boehm, Timur Delahaye, Pierre Salati, Florian Staub, Ritesh K. Singh

Fuente: https://arxiv.org/







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