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Journal Articles Physics Letters B Year : 2014

Searching a Dark Photon with HADES

G. Agakishiev
  • Function : Author
A. Balanda
  • Function : Author
D. Belver
  • Function : Author
A. Belyaev
  • Function : Author
J. C. Berger-Chen
  • Function : Author
A. Blanco
  • Function : Author
M. Boehmer
  • Function : Author
P. Cabanelas
  • Function : Author
S. Chernenko
  • Function : Author
A. Dybczak
  • Function : Author
E. Epple
  • Function : Author
L. Fabbbietti
  • Function : Author
O. Fateev
  • Function : Author
P. Finocchiaro
  • Function : Author
P. Fonte
  • Function : Author
J. Friese
  • Function : Author
I. Froehlich
  • Function : Author
T. Galatyuk
  • Function : Author
J. A. Garzon
  • Function : Author
R. Gernhaeuser
  • Function : Author
K. Goebel
  • Function : Author
M. Golubeva
  • Function : Author
D. Gonzalez-Diaz
  • Function : Author
F. Guber
  • Function : Author
M. Gumberidze
  • Function : Author
T. Heinz
R. Holzmann
  • Function : Author
A. Ierusalimov
  • Function : Author
I. Iori
  • Function : Author
A. Ivashkin
  • Function : Author
M. Jurkovic
  • Function : Author
B. Kaempfer
  • Function : Author
T. Karavicheva
  • Function : Author
I. Koenig
  • Function : Author
W. Koenig
  • Function : Author
B. W. Kolb
  • Function : Author
G. Kornakov
  • Function : Author
R. Kotte
  • Function : Author
A. Krasa
  • Function : Author
F. Krizek
  • Function : Author
R. Kruecken
  • Function : Author
W. Kuehn
  • Function : Author
A. Kugler
  • Function : Author
A. Kurepin
  • Function : Author
V. Ladygin
  • Function : Author
R. Lalik
  • Function : Author
S. Lang
  • Function : Author
K. Lapidus
  • Function : Author
A. Lebedev
  • Function : Author
T. Liu
  • Function : Author
L. Lopes
  • Function : Author
M. Lorenz
  • Function : Author
L. Maier
  • Function : Author
A. Mangiarotti
  • Function : Author
J. Markert
  • Function : Author
V. Metag
  • Function : Author
B. Michalska
  • Function : Author
J. Michel
  • Function : Author
C. Muentz
  • Function : Author
L. Naumann
  • Function : Author
Y. C. Pachmayer
  • Function : Author
M. Palka
  • Function : Author
Y. Parpottas
  • Function : Author
V. Pechenov
  • Function : Author
O. Pechenova
  • Function : Author
V. Petousis
  • Function : Author
J. Pietraszko
  • Function : Author
W. Przygoda
  • Function : Author
A. Reshetin
  • Function : Author
A. Rustamov
  • Function : Author
A. Sadovsky
  • Function : Author
P. Salabura
  • Function : Author
T. Scheib
  • Function : Author
H. Schuldes
  • Function : Author
A. Schmah
  • Function : Author
E. Schwab
  • Function : Author
J. Siebenson
  • Function : Author
Yu. G. Sobolev
  • Function : Author
S. Spataro
  • Function : Author
B. Spruck
  • Function : Author
H. Stroebele
  • Function : Author
J. Stroth
  • Function : Author
C. Sturm
  • Function : Author
A. Tarantola
  • Function : Author
K. Teilab
  • Function : Author
P. Tlusty
  • Function : Author
M. Traxler
  • Function : Author
R. Trebacz
  • Function : Author
H. Tsertos
  • Function : Author
T. Vasiliev
  • Function : Author
V. Wagner
  • Function : Author
M. Weber
  • Function : Author
C. Wendisch
  • Function : Author
J. Wuestenfeld
  • Function : Author
S. Yurevich
  • Function : Author
Y. Zanevsky
  • Function : Author

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.

Dates and versions

in2p3-00908672 , version 1 (25-11-2013)

Identifiers

Cite

G. Agakishiev, A. Balanda, D. Belver, A. Belyaev, J. C. Berger-Chen, et al.. Searching a Dark Photon with HADES. Physics Letters B, 2014, 731, pp.265-271. ⟨10.1016/j.physletb.2014.02.035⟩. ⟨in2p3-00908672⟩
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