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| 001 | 291772 | ||
| 005 | 20211110132644.0 | ||
| 024 | 7 | _ | |a 10.3204/DESY-PROC-2014-04/9 |2 datacite_doi |
| 037 | _ | _ | |a PUBDB-2015-05588 |
| 041 | _ | _ | |a en |
| 088 | 1 | _ | |a DESY-PROC-2014-04 |
| 088 | _ | _ | |a DESY-PROC-2014-04 |2 DESY |
| 100 | 1 | _ | |a Holzmann, Romain |b 0 |
| 111 | 2 | _ | |a Panic2014 |g Panic2014 |c Hamburg |d 2014-08-25 - 2014-08-29 |w Germany |
| 245 | _ | _ | |a Searching a Dark Photon with HADES |
| 260 | _ | _ | |a Hamburg |c 2014 |b Deutsches Elektronen-Synchrotron, DESY |
| 300 | _ | _ | |a 382-385 |
| 336 | 7 | _ | |a Conference Paper |0 33 |2 EndNote |
| 336 | 7 | _ | |a conferenceObject |2 DRIVER |
| 336 | 7 | _ | |a Contribution to a conference proceedings |b contrib |m contrib |0 PUB:(DE-HGF)8 |s 1449829130_27435 |2 PUB:(DE-HGF) |
| 336 | 7 | _ | |a Internal Report |0 PUB:(DE-HGF)15 |2 PUB:(DE-HGF) |m intrep |
| 336 | 7 | _ | |a INPROCEEDINGS |2 BibTeX |
| 520 | _ | _ | |a The existence of a photon-like massive particle, the $\gamma'$ or dark photon, is postulated inseveral extensions of the Standard Model. Such a particle could indeed help to explain the puzzlingbehavior of the observed cosmic-ray positron fraction as well as to solve the so far unexplained deviationbetween the measured and calculated values of the muon $g-2$ anomaly. The dark photon, unlike itsconventional counterpart, would have mass and would be detectable via its mixing with the latter.We present a search for the e$^+$e$^-$ decay of such a hypothetical dark photon, also named $U$~boson, in inclusive dielectron spectra measured with HADES in the p (3.5 GeV) + p, Nb reactions, as well asin the Ar (1.756 GeV/u) + KCl reaction. A new upper limit on the kinetic mixing parametersquared ($\epsilon^2$) at 90\% CL has been obtained in the mass range $M_U$ = 0.02 -- 0.55 GeVand is compared here with the present world data set. For masses 0.03 -- 0.1 GeV, the limit has beenlowered with respect to previous results, allowing to exclude a large part of the parameter spacefavored by the muon $g-2$ anomaly. |
| 536 | _ | _ | |0 G:(DE-HGF)POF3-611 |c POF3-611 |f POF III |x 0 |a 611 - Fundamental Particles and Forces (POF3-611) |
| 588 | _ | _ | |a Dataset connected to DataCite, INSPIRE |
| 650 | _ | 7 | |a positron: cosmic radiation |2 autogen |
| 650 | _ | 7 | |a particle: massive |2 autogen |
| 650 | _ | 7 | |a mixing: kinetic |2 autogen |
| 650 | _ | 7 | |a photon |2 autogen |
| 650 | _ | 7 | |a magnetic moment |2 autogen |
| 650 | _ | 7 | |a anomaly |2 autogen |
| 650 | _ | 7 | |a HADES |2 autogen |
| 650 | _ | 7 | |a muon |2 autogen |
| 693 | _ | _ | |0 EXP:(DE-MLZ)NOSPEC-20140101 |5 EXP:(DE-MLZ)NOSPEC-20140101 |e No specific instrument |x 0 |
| 700 | 1 | _ | |a Gumberidze, Malgorzata |b 1 |
| 700 | 1 | _ | |a HADES Collaboration |0 P:(DE-HGF)0 |b 2 |e Collaboration Author |
| 773 | _ | _ | |a 10.3204/DESY-PROC-2014-04/9 |
| 787 | 0 | _ | |a Schmidt, Alexander et.al. |d Hamburg : Deutsches Elektronen-Synchrotron, DESY, Hamburg, 2014 |i IsPartOf |0 PUBDB-2015-03603 |r DESY-PROC-2014-04 |t Proceedings, 20th International Conference on Particles and Nuclei (PANIC 14) |
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| 913 | 1 | _ | |a DE-HGF |b Forschungsbereich Materie |l Materie und Universum |1 G:(DE-HGF)POF3-610 |0 G:(DE-HGF)POF3-611 |2 G:(DE-HGF)POF3-600 |x 0 |4 G:(DE-HGF)POF |v Fundamental Particles and Forces |3 G:(DE-HGF)POF3 |
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| 920 | 1 | _ | |0 I:(DE-H253)CMS-20120731 |k CMS |l LHC/CMS Experiment |x 1 |
| 920 | 1 | _ | |0 I:(DE-H253)UNI_EXP-20120731 |k UNI/EXP |l Uni Hamburg / Experimentalphysik |x 2 |
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