Search for the X(4140) state in B+→J/ψϕK+ decays with the D0 detector

V. M. Abazov,Brad Abbott,B. S. Acharya,M. R. Adams,Todd Adams,J. P. Agnew,G. D. Alexeev, G. Alkhazov,A. Alton, Andrew Askew, S. Atkins,Kamil Augsten,Carlos Avila, F. Badaud,L. Bagby, B. Baldin, D. V. Bandurin, S. Banerjee, Emanuela Barberis,Philip Baringer,J. F. Bartlett,U. Bassler, V. E. Bazterra,Alice Bean,Marcia Begalli, L. Bellantoni,Suman Bala Beri,Gregorio Bernardi, R. Bernhard,Iain Alexander Bertram, Marc Besancon,R. Beuselinck,Pushpalatha C Bhat,S. Bhatia,Vipin Bhatnagar,G. C. Blazey,S. Blessing,Kenneth Bloom, A. Boehnlein, D. Boline, E. E. Boos,Guennadi Borissov,Andrew Brandt,Oleg Brandt,Raymond Brock, A. Bross,D.P. Brown,X. B. Bu,M. Buehler,Volker Buescher,V. Bunichev,Sergey Burdin, C. P. Buszello,E. Camacho-Pérez,B. C.K. Casey, Heriberto Castilla-Valdez, S. Caughron, S. Chakrabarti,K. M. Chan,A. Chandra,Emilien Chapon,Guo-Ming Chen,S. W. Cho,Suyong Choi,Brajesh C Choudhary, S. Cihangir, D. R. Claes, J. Clutter,M. Cooke,W. E. Cooper,M. D. Corcoran,Fabrice Couderc, M. C. Cousinou, D. Cutts,A. Das,Gavin Davies,S. J. De Jong,E. De La Cruz-Burelo,Frederic Deliot,Regina Demina,D. Denisov,S. P. Denisov,S. Desai,Cecile Deterre, K. Devaughan,H. T. Diehl, M. Diesburg,P. F. Ding,Aaron Dominguez,A. Dubey,Lev Dudko,Arnaud Duperrin,Suneel Dutt, M. Eads, D. Edmunds,J. Ellison,Victor Daniel Elvira, Yuji Enari,Hal Evans, V. N. Evdokimov

Physical Review D（2014）

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摘要

We investigate the decay B+ -> J/psi phi K+ in a search for the X(4140) state, a narrow threshold resonance in the J/psi phi system. The data sample corresponds to an integrated luminosity of 10.4 fb(-1) of p (p) over bar collisions at root s = 1.96 TeV collected by the D0 experiment at the Fermilab Tevatron collider. We observe a mass peak with a statistical significance of 3.1 standard deviations and measure its invariant mass to be M = 4159.0 +/- 4.3(stat) +/- 6.6(syst) MeV and its width to be Gamma = 19.9 +/- 12.6(stat)(-8.0)(+3.0)(syst) MeV.

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