Observation of the y (4 1 4 0) structure in the J/mass spectrum in B ±±→K ± decays

Authors

T. Aaltonen, Helsingin Yliopisto
B. Alvarez Gonzálezv, Universidad de Cantabria
S. Amerio, Istituto Nazionale Di Fisica Nucleare, Sezione di Padova
D. Amidei, University of Michigan, Ann Arbor
A. Anastassov, Northwestern University
A. Annovi, INFN, Laboratori Nazionali Di Frascati
J. Antos, Univerzita Komenského v Bratislave
G. Apollinari, Fermi National Accelerator Laboratory
J. A. Appel, Fermi National Accelerator Laboratory
A. Apresyan, Purdue University
T. Arisawa, Waseda University
A. Artikov, Joint Institute for Nuclear Research, Dubna
J. Asaadi, Texas A&M University
W. Ashmanskas, Fermi National Accelerator Laboratory
B. Auerbach, Yale University
A. Aurisano, Texas A&M University
F. Azfar, University of Oxford
W. Badgett, Fermi National Accelerator Laboratory
A. Barbaro-Galtieri, Lawrence Berkeley National Laboratory
V. E. Barnes, Purdue University
B. A. Barnett, Johns Hopkins University
P. Barria, Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
P. Bartos, Univerzita Komenského v Bratislave
M. Bauce, Istituto Nazionale Di Fisica Nucleare, Sezione di Padova
G. Bauer, Massachusetts Institute of Technology
F. Bedeschi, Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
D. Beecher, University College London
S. Behari, Johns Hopkins University

Document Type

Article

Publication Date

8-30-2017

Abstract

The observation of the Y (4140) structure in B± → J/ΨφK± decays produced in pp collisions at √ s = 1.96 TeV is reported with a statistical significance greater than 5 standard deviations. A fit to the J/Ψφ mass spectrum is performed assuming the presence of a Breit-Wigner resonance. The fit yields a signal of 19 ± 6 (stat) ± 3 (syst) resonance events, and resonance mass and width of 4143.4+2.9 -3.0 (stat)±0.6 (syst) MeV/c2 and 15.3+10.4 -6.1 (stat)±2.5 (syst) MeV/c2, respectively. The parameters of this resonancelike structure are consistent with values reported from an earlier CDF analysis.

Publication Source (Journal or Book title)

Modern Physics Letters A

Recommended Citation

Aaltonen, T., Alvarez Gonzálezv, B., Amerio, S., Amidei, D., Anastassov, A., Annovi, A., Antos, J., Apollinari, G., Appel, J., Apresyan, A., Arisawa, T., Artikov, A., Asaadi, J., Ashmanskas, W., Auerbach, B., Aurisano, A., Azfar, F., Badgett, W., Barbaro-Galtieri, A., Barnes, V., Barnett, B., Barria, P., Bartos, P., Bauce, M., Bauer, G., Bedeschi, F., Beecher, D., & Behari, S. (2017). Observation of the y (4 1 4 0) structure in the J/mass spectrum in B ±±→K ± decays. Modern Physics Letters A, 32 (26) https://doi.org/10.1142/S0217732317501395