Evidence for a B0sπ± State

Abazov, VM, Abbott, B, Acharya, BS, Adams, M, Adams, T, Agnew, JP, Alexeev, GD, Alkhazov, G, Alton, A, Askew, A
et al (show 361 more authors) (2016) Evidence for a B0sπ± State. PHYSICAL REVIEW LETTERS, 117 (2). 022003-.

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We report evidence for a narrow structure, X(5568), in the decay sequence X(5568) -> B-s(0)pi(+/-), B-s(0) -> J/psi phi, J/psi -> mu(+)mu(-), phi -> K+K-. This is evidence for the first instance of a hadronic state with valence quarks of four different flavors. The mass and natural width of this state are measured to be m = 5567.8 +/- 2.9(stat)(-1.9)(+0.9) (syst) MeV/c(2) and Gamma = 21.9 +/- 6.4(stat)(-2.5)(+5.0) (syst) MeV/c(2). If the decay is X(5568) -> B-s*pi(+/-). B-s(0)gamma pi(+/-) with an unseen gamma, m(X(5568)) will be shifted up by m(B-s*) - m(B-s(0)) similar to 49 MeV/c(2). This measurement is based on 10.4 fb(-1) of p (p) over bar collision data at root s = 1.96 TeV collected by the D0 experiment at the Fermilab Tevatron collider.

Item Type: Article
Additional Information: 8 pages, 4 figures, published in Phys. Rev. Lett
Uncontrolled Keywords: D0 Collaboration
Depositing User: Symplectic Admin
Date Deposited: 03 Oct 2019 13:20
Last Modified: 19 Jan 2023 00:24
DOI: 10.1103/PhysRevLett.117.022003
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3056882