About: Searching a dark photon with HADES

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	We present a search for the e(+)e(-) decay of a hypothetical dark photon, also named U vector boson, in inclusive dielectron spectra measured by HADES in the p(3.5 GeV) + p, Nb reactions, as well as the Ar (1.756 GeV/u) KCl reaction. An upper limit on the kinetic mixing parameter squared epsilon(2) at 90% CL has been obtained for the mass range M-U = 0.02-0.55 GeV/c(2) and is compared with the present world data set. For masses 0.03-0.1 GeV/c(2), the limit has been lowered with respect to previous results, allowing now to exclude a large part of the parameter region favored by the muon g - 2 anomaly. Furthermore, an improved upper limit on the branching ratio of 2.3 x 10(-6) has been set on the helicity-suppressed direct decay of the eta meson, eta --> e(+)e(-), at 90% CL. We present a search for the e(+)e(-) decay of a hypothetical dark photon, also named U vector boson, in inclusive dielectron spectra measured by HADES in the p(3.5 GeV) + p, Nb reactions, as well as the Ar (1.756 GeV/u) KCl reaction. An upper limit on the kinetic mixing parameter squared epsilon(2) at 90% CL has been obtained for the mass range M-U = 0.02-0.55 GeV/c(2) and is compared with the present world data set. For masses 0.03-0.1 GeV/c(2), the limit has been lowered with respect to previous results, allowing now to exclude a large part of the parameter region favored by the muon g - 2 anomaly. Furthermore, an improved upper limit on the branching ratio of 2.3 x 10(-6) has been set on the helicity-suppressed direct decay of the eta meson, eta --> e(+)e(-), at 90% CL. (en)
Title	Searching a dark photon with HADES Searching a dark photon with HADES (en)
skos:prefLabel	Searching a dark photon with HADES Searching a dark photon with HADES (en)
skos:notation	RIV/61389005:_____/14:00428220!RIV15-GA0-61389005
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(GA13-06759S), P(LG14004)
http://linked.open...iv/cisloPeriodika	APR
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Krása, Antonín Tlustý, Pavel Křížek, Filip Kugler, Andrej Wagner, Vladimír Sobolev, Yuri
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav jaderné fyziky AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	44093
http://linked.open...ai/riv/idVysledku	RIV/61389005:_____/14:00428220
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	HADES; dark photon; hidden sector; dark matter; rare eta decays (en)
http://linked.open.../riv/klicoveSlovo	hidden sector rare eta decays HADES dark photon dark matter
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[D2EE857BC9AE]
http://linked.open...i/riv/nazevZdroje	Physics Letters. B
http://linked.open...in/vavai/riv/obor	BG
http://linked.open...ichTvurcuVysledku	6 (xsd:int)
http://linked.open...cetTvurcuVysledku	100 (xsd:int)
http://linked.open...vavai/riv/projekt	Experimentální studium hadronů v baryonovém prostředí Cooperation of Czech Republic with JINR Dubna in the theoretical and nuclear physics and application of nuclear methods in other fields
http://linked.open...UplatneniVysledku	2014
http://linked.open...v/svazekPeriodika	731
http://linked.open...iv/tvurceVysledku	Krása, Antonín Křížek, Filip Tlustý, Pavel Wagner, Vladimír Agakishiev, G. Balanda, A. Belver, D. Belyaev, A. Blanco, A. Boyard, J. L. Cabanelas, P. Chernenko, S. Dybczak, A. Epple, E. Fabbietti, L. Fateev, O. Kugler, Andrej Böhmer, M. Berger-Chen, J. C. Sobolev, Yuri, G.
http://linked.open...ain/vavai/riv/wos	000334094500041
issn	0370-2693
number of pages	6 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.physletb.2014.02.035

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