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Searching a Dark Photon with HADES | HADES Collaboration
; G. Agakishiev
; A. Balanda
; D. Belver
; A. Belyaev
; J.C. Berger-Chen
; A. Blanco
; M. Boehmer
; J. L. Boyard
; P. Cabanelas
; S. Chernenko
; A. Dybczak
; E. Epple
; L. Fabbbietti
; O. Fateev
; P. Finocchiaro
; P. Fonte
; J. Friese
; I. Froehlich
; T. Galatyuk
; J. A. Garzon
; R. Gernhaeuser
; K. Goebel
; M. Golubeva
; D. Gonzalez-Diaz
; F. Guber
; M. Gumberidze
; T. Heinz
; T. Hennino
; R. Holzmann
; A. Ierusalimov
; I. Iori
; A. Ivashkin
; M. Jurkovic
; B. Kaempfer
; T. Karavicheva
; I. Koenig
; W. Koenig
; B. W. Kolb
; G. Kornakov
; R. Kotte
; A. Krasa
; F. Krizek
; R. Kruecken
; H. Kuc
; W. Kuehn
; A. Kugler
; A. Kurepin
; V. Ladygin
; R. Lalik
; S. Lang
; K. Lapidus
; A. Lebedev
; T. Liu
; L. Lopes
; M. Lorenz
; L. Maier
; A. Mangiarotti
; J. Markert
; V. Metag
; B. Michalska
; J. Michel
; C. Muentz
; L. Naumann
; Y. C. Pachmayer
; M. Palka
; Y. Parpottas
; V. Pechenov
; O. Pechenova
; V. Petousis
; J. Pietraszko
; W. Przygoda
; B. Ramstein
; A. Reshetin
; A. Rustamov
; A. Sadovsky
; P. Salabura
; T. Scheib
; H. Schuldes
; A. Schmah
; E. Schwab
; J. Siebenson
; Yu.G. Sobolev
; S. Spataro
; B. Spruck
; H. Stroebele
; J. Stroth
; C. Sturm
; A. Tarantola
; K. Teilab
; P. Tlusty
; M. Traxler
; R. Trebacz
; H. Tsertos
; T. Vasiliev
; V. Wagner
; M. Weber
; C. Wendisch
; J. Wuestenfeld
; S. Yurevich
; Y. Zanevsky
; | Date: |
1 Nov 2013 | Abstract: | We present a search for the e+e- decay of a hypothetical dark photon, also
names 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/c2 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 favoured by the muon g-2 anomaly. Furthermore, an
improved upper limit on the branching ratio of 2.3 * 10^{-6} has been set on
the helicity-suppressed direct decay of the eta meson, eta-> e+e-, at 90% CL. | Source: | arXiv, 1311.0216 | Services: | Forum | Review | PDF | Favorites |
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