TY  - JOUR
AU  - LHCb Collaboration (Aaij, R. et al
AU  - Garcia Martin, L. M.
AU  - Henry, L.
AU  - Martinez-Vidal, F.
AU  - Oyanguren, A.
AU  - Remon Alepuz, C.
AU  - Ruiz Vidal, J.
AU  - Sanchez Mayordomo, C.
PY  - 2018
DA  - 2018//
TI  - Evidence for an etac(1S)pi- resonance in B0 etac(1S)K+pi- decays
T2  - Eur. Phys. J. C
JO  - European Physical Journal C
SP  - 1019
EP  - 23pp
VL  - 78
IS  - 12
PB  - Springer
AB  - A Dalitz plot analysis of /30 ric(1S)K+7decays is performed using data samples of pp collisions collected with the LHCb detector at centre -of -mass energies of./7 = 7, 8 and 13 TeV, corresponding to a total integrated luminosity of 4.7 fb-1. A satisfactory description of the data is obtained when including a contribution representing an exotic qc (1 S).7-- resonant state. The significance of this exotic resonance is more than three standard deviations, while its mass and width are 4096 20 is MeV and 152 +58 -P6 MeV, respectively. The spin -parity assignments JP = 0+ and JP = 1- are both consistent with the data. In addition, the first measurement of the B -> ric(1S)K+71-branching fraction is performed and gives B(B -> = (5.73 0.24 0.13 0.66) x 10-4, where the first uncertainty is statistical, the second systematic, and the third is due to limited knowledge of external branching fractions.
SN  - 1434-6044
UR  - http://arxiv.org/abs/1809.07416
UR  - https://doi.org/10.1140/epjc/s10052-018-6447-z
DO  - 10.1140/epjc/s10052-018-6447-z
LA  - English
N1  - WOS:000453398100001
ID  - LHCbCollaborationAaij_etal2018
ER  -