Study of CP-violating charge asymmetries of single muons and like-sign dimuons in p pbar collisions

0434088 - FZÚ 2015 RIV US eng J - Journal Article
Abazov, V. M. - Abbott, B. - Acharya, B.S. - Kupčo, Alexander - Lokajíček, Miloš … Total 359 authors
Study of CP-violating charge asymmetries of single muons and like-sign dimuons in p pbar collisions.
Physical Review D: Particles, Fields, Gravitation and Cosmology. Roč. 89, č. 1 (2014), "012002-1"-"012002-31". ISSN 1550-7998
R&D Projects: GA MŠMT(CZ) LG12006
Institutional support: RVO:68378271
Keywords : D0 * Fermilab * charge asymmetry * CP violation * same sign * charge: asymmetry * dimuon * charge * muon * charge * meson * mixing * width difference
Subject RIV: BF - Elementary Particles and High Energy Physics
Impact factor: 4.643, year: 2014

We measure the inclusive single muon charge asymmetry and the like-sign dimuon charge asymmetry in pp¯ collisions using the full data set of 10.4 fb−1 collected with the D0 detector at the Fermilab Tevatron. The standard model predictions of the charge asymmetries induced by CP violation are small in magnitude compared to the current experimental precision, so non-zero measurements could indicate new sources of CP violation. The measurements differ from the standard model predictions of CP violation in these asymmetries with a significance of 3.6 standard deviations. These results are interpreted in a framework of B meson mixing within the CKM formalism to measure the relative width difference /dgg between the mass eigenstates of the /Bd meson system, and the semileptonic charge asymmetries /asld and /asls of /Bd and /Bs mesons respectively.
Permanent Link: http://hdl.handle.net/11104/0238234