Search for the X(4140) state in B+ to J/psi phi K+ decays
LHCb Collaboration: R. Aaij, C. Abellan Beteta, B. Adeva, M. Adinolfi,, C. Adrover, A. Affolder, Z. Ajaltouni, J. Albrecht, F. Alessio, M. Alexander,, G. Alkhazov, P. Alvarez Cartelle, A.A. Alves Jr, S. Amato, Y. Amhis, J., Anderson, R.B. Appleby, O. Aquines Gutierrez
TL;DR
This study searches for the X(4140) particle in B+ decays using LHCb data but finds no evidence, setting an upper limit on its production rate and noting disagreement with previous CDF results.
Contribution
The paper provides the first LHCb search for X(4140) in B+ decays and establishes an upper limit on its production rate, contrasting with earlier findings.
Findings
No evidence for X(4140) in B+ decays
Sets an upper limit on the production rate of X(4140)
Disagrees with previous CDF measurement
Abstract
A search for the X(4140) state in B+ to J/psi phi K+ decays is performed with 0.37 fb-1 of pp collisions at sqrt(s)=7 TeV collected by the LHCb experiment. No evidence for this state is found, in 2.4 sigma disagreement with a measurement by CDF. An upper limit on its production rate is set, BR(B+ to X(4140) K+) BR(X(4140) to J/psi phi) / BR(B+ to J/psi phi K+) < 0.07 at 90% confidence level.
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