Studies of Bs2∗ (5840)0 and B s 1 (5830) 0 mesons including the observation of the Bs2∗ (5840)0 → B0 KS0 decay in proton-proton collisions at √s=8TeV
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Type :
Article
Publication Status :
Published
Access :
openAccess
Abstract
Measurements of B-s2*(5840)(0) and B-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 B-s(0) meson decays into B(*)(+)K(-)and B(*)K-0(S)0, where the B+ and B-0 mesons are identified using the decays B+ -> J/psi K+ and B-0 -> J/psi K* (892)(0). The masses of the P-wave B-s(0) meson states are measured and the natural width of the B-s2*(5840)(0) state is determined. The first measurement of the mass difference between the charged and neutral B* mesons is also presented. The B-s2*(5840)(0) decay to (BKS0)-K-0 is observed, together with a measurement of its branching fraction relative to the B-s2*(5840)(0) -> B+K- decay.
Source :
European Physical Journal C
Date :
2018-11
Volume :
78
Issue :
11
Publisher :
Springer Nature
URI
http://hdl.handle.net/10679/6210https://link.springer.com/article/10.1140/epjc/s10052-018-6390-z
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