Studies of $${\mathrm {B}} ^{*}_{{\mathrm {s}}2}(5840)^0 $$ and $${\mathrm {B}} _{{\mathrm {s}}1}(5830)^0 $$ mesons including the observation of the $${\mathrm {B}} ^{*}_{{\mathrm {s}}2}(5840)^0 \rightarrow {\mathrm {B}} ^0 \mathrm {K} ^0_{\mathrm {S}} $$ decay in proton-proton collisions at $$\sqrt{s}=8\,\text {TeV} $$
Measurements of $$\mathrm{B}^*_\mathrm{s2}(5840)^0$$ and $$\mathrm{B}_\mathrm{s1}(5830)^0$$ mesons are performed using a data sample of proton-proton collisions corresponding to an integrated luminosity of 19.6 fb$$^{-1}$$, collected with the CMS detector at the LHC at a centre-of-mass energy of 8 TeV. The analysis studies $$P$$-wave $$\mathrm{B}^0_\mathrm{S}$$ meson decays into $$\mathrm{B}^{(*)+}\mathrm{K}^-$$ and $$\mathrm{B}^{(*)0}\mathrm{K}^0_\mathrm{S}$$, where the $$\mathrm{B}^+$$ and $$\mathrm{B}^0$$ mesons are identified using the decays $$\mathrm{B}^+\to\mathrm{J}/\psi\,\mathrm{K}^+$$ and $$\mathrm{B}^0\to\mathrm{J}/\psi\,\mathrm{K}^*(892)^0$$. The masses of the $$P$$-wave $$\mathrm{B}^0_\mathrm{S}$$ meson states are measured and the natural width of the $$\mathrm{B}^*_\mathrm{s2}(5840)^0$$ state is determined. The first measurement of the mass difference between the charged and neutral $$\mathrm{B}^*$$ mesons is also presented. The $$\mathrm{B}^*_\mathrm{s2}(5840)^0$$ decay to $$\mathrm{B}^0\mathrm{K}^0_\mathrm{S}$$ is observed, together with a measurement of its branching fraction relative to the $$\mathrm{B}^*_\mathrm{s2}(5840)^0\to\mathrm{B}^+\mathrm{K}^-$$ decay.
- Research Organization:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
- Contributing Organization:
- CMS Collaboration
- Grant/Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1475049
- Report Number(s):
- CERN-EP--2018-224; CMS-BPH--16-003; FERMILAB-PUB--18-523-CMS; arXiv:1809.03578; 1693614
- Journal Information:
- European Physical Journal. C, Particles and Fields, Journal Name: European Physical Journal. C, Particles and Fields Journal Issue: 11 Vol. 78; ISSN 1434-6044
- Publisher:
- SpringerCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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