Inclusive production of the $$P_c$$ resonances in $$p \overline p $$ collisions
We present a study of the inclusive production in $$p \overline p $$ collisions of the pentaquark states $$P_c(4440)$$ and $$P_c(4457)$$ with the decay to the $$J/\psi p$$ final state previously observed by the LHCb experiment. Using a sample of candidates originating from decays of $$b$$-flavored hadrons, we find an enhancement in the $$J/\psi p$$ invariant mass distribution consistent with a sum of $$P_c(4440)$$ and $$P_c(4457)$$. The significance, with the input parameters set to the LHCb values, is $$3.0\sigma$$. This is the first confirmatory evidence for these pentaquark states. We measure the ratio $$N_{\rm prompt}/N_{\rm nonprompt}=0.05 \pm 0.39$$ and set an upper limit of 0.8 at the 95\% credibility level. The ratio of the yield of the $$P_c(4312)$$ to the sum of $$P_c(4440)$$ and $$P_c(4457)$$ is less than 0.6 at the 95\% credibility level. The study is based on $$10.4~\rm{fb^{-1}}$$ of data collected by the D0 experiment at the Fermilab Tevatron collider.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Organization:
- D0
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1631141
- Report Number(s):
- arXiv:1910.11767; FERMILAB-PUB-19-542-E; oai:inspirehep.net:1761087
- Journal Information:
- TBD, Journal Name: TBD
- Country of Publication:
- United States
- Language:
- English
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