A search for the exclusive production of the Zc±(3900) hadron by virtual photons has been performed in the channel Zc±(3900)→J/ψπ±. The data cover the range from 7 GeV to 19 GeV in the centre-of-mass energy of the photon–nucleon system. The full set of the COMPASS data set collected with a muon beam between 2002 and 2011 has been used. An upper limit for the ratio BR(Zc±(3900)→J/ψπ±)×σγN→Zc±(3900)N/σγN→J/ψN of 3.7×10−33.7×10−3 has been established at the confidence level of 90%.
Search for exclusive photoproduction of Zc±(3900) at COMPASS
BRADAMANTE, FRANCO;BRESSAN, Andrea;DALLA TORRE, SILVIA;DASGUPTA, SHUDDHA SHANKAR;DUIC, VENICIO;ELIA, CARMINE;LEVORATO, STEFANO;Makke, Nour;MARTIN, ANNA;MATOUSEK, JAN;SBRIZZAI, GIULIO;SCHIAVON, PAOLO;SOZZI, FEDERICA;TAKEKAWA, STEFANO;
2015-01-01
Abstract
A search for the exclusive production of the Zc±(3900) hadron by virtual photons has been performed in the channel Zc±(3900)→J/ψπ±. The data cover the range from 7 GeV to 19 GeV in the centre-of-mass energy of the photon–nucleon system. The full set of the COMPASS data set collected with a muon beam between 2002 and 2011 has been used. An upper limit for the ratio BR(Zc±(3900)→J/ψπ±)×σγN→Zc±(3900)N/σγN→J/ψN of 3.7×10−33.7×10−3 has been established at the confidence level of 90%.File in questo prodotto:
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