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Search for a dark photon in the pi(0) -> e(+)e(-)gamma decay

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Title Search for a dark photon in the pi(0) -> e(+)e(-)gamma decay
 
Creator ADLARSON, P
AUGUSTYNIAK, W
BARDAN, W
BASHKANOV, M
BERGMANN, FS
BERLOWSKI, M
BHATT, H
BONDAR, A
BUSCHER, M
CALEN, H
CIEPAL, I
CLEMENT, H
CODERRE, D
CZERWINSKI, E
DEMMICH, K
DOROSHKEVICH, E
ENGELS, R
ERVEN, W
EYRICH, W
FEDORETS, P
FOHL, K
FRANSSON, K
GOLDENBAUM, E
GOSLAWSKI, P
GOSWAMI, A
GRIGORYEV, K
GULLSTROM, CO
HAUENSTEINN, F
HEIJKENSKJOLD, L
HEJNY, V
HINTERBERGER, F
HODANA, M
HOISTAD, B
JANY, A
JANY, BR
JARCZYK, L
JOHANSSON, T
KAMYS, B
KEMMERLING, G
KHAN, FA
KHOUKAZ, A
KISTRYN, S
KLAJA, J
KLEINES, H
KIRILLOV, DA
KLOS, B
KRAPP, M
KRZEMIEN, W
KULESSA, P
KUPSC, A
KUZMIN, A
LALWANI, K
LERSCH, D
LI, L
LORENTZ, B
MAGIERA, A
MAIER, R
MARCINIEWSKI, P
MARIANSKI, B
MEISSNER, UG
MIKIRTYCHIANTS, M
MORSCH, HP
MOSKAL, P
NANDI, BK
OHM, H
OZERIANSKA, I
DEL RIO, EP
PISKUNOV, NM
PLUCINSKI, P
PODKOPAL, P
PRASUHN, D
PRICKING, A
PSZCZEL, D
PYSZ, K
PYSZNIAK, A
REDMER, CF
RITMAN, J
ROY, A
RUDY, Z
SAWANT, S
SCHADMAND, S
SCHMIDT, A
SEFZICK, T
SERDYUK, V
SHAH, N
SHWARTZ, B
SIEMASZKO, M
SIUDAK, R
SKORODKO, T
SKURZOK, M
SMYRSKI, J
SOPOV, V
STASSEN, R
STEPANIAK, J
STEPHAN, E
STERZENBACH, G
STOCKHORST, H
STROHER, H
SZCZUREK, A
TOLBA, T
TRZCINSKI, A
VARMA, R
WAGNER, GJ
WEGLORZ, W
WIRZBA, A
WOLKE, M
WRONSKA, A
WUSTNER, P
WURM, P
YAMAMOTO, A
ZABIEROWSKI, J
ZIELINSKI, MJ
ZIPPER, W
ZLOMANCZUK, J
ZUPRANSKI, P
ZUREK, M
 
Subject Dark forces
Gauge vector boson
VECTOR GAUGE BOSON
PHI-MESON DECAYS
KLOE DETECTOR
ENERGIES
 
Description The presently world largest data sample for pi(0) -> gamma e(+)e(-) decays studies containing nearly 5 x 10(5) events was collected using the WASA detector at COSY. A search for a dark photon U produced in the pi(0) -> gamma U -> gamma e(+)e(-) decay from the pp -> pp pi(0) reaction was carried out. An upper limit on the square of the U -> gamma mixing strength parameter epsilon(2) of 5 x 10(-6) at 90% CL was obtained for the mass range 20 MeV < M-U < 100 MeV. This result together with other recent experimental limits significantly reduces the M-U vs. epsilon(2) parameter space which could explain the presently seen deviation between the Standard Model prediction and the direct measurement of the anomalous magnetic moment of the muon. (C) 2013 Elsevier B.V. All rights reserved.
 
Publisher ELSEVIER SCIENCE BV
 
Date 2014-10-17T06:06:42Z
2014-10-17T06:06:42Z
2013
 
Type Article
 
Identifier PHYSICS LETTERS B, 726(1-3)187-193
0370-2693
1873-2445
http://dx.doi.org/10.1016/j.physletb.2013.08.055
http://dspace.library.iitb.ac.in/jspui/handle/100/16142
 
Language en