2010/12/01 by Chuan-Hung Chen, Chen, Chuan-Hung, C. S. Kim +3
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Neutrino Physics Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-ph
paper · pdf · doi:10.48550/arxiv.1012.0095
13 pages, 4 figures, references added, typos corrected
openalex publication_date 2010/12/01 · arxiv created 2010/12/02 · arxiv updated 2015/03/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Recently the DØ Collaboration reported an observation of like-sign charge asymmetry (CA), which is about 3.2 σ deviation from the standard model (SM) prediction. Inspired by the observation we investigate the scalar unparticle effects, under the color charge of SU(3)c symmetry, in the CP violation in neutral B meson oscillations as well as the dispersive and absorptive parts of Bq↔ Bq transition, which can be related to the CA directly. In order to illustrate the peculiar properties of unparticle, our analysis is carried out in two scenarios for the right-handed section: (I) λR=λL and UDR=UDL, where λL,R and UDL,R are the couplings and flavor mixing matrix of left- and right-handed section, respectively; (II) λR >> λL and UDR is completely a free parameter. In scenario I we found that the wrong- and like-sign CA cannot be changed significantly for a SM-like CP violating source because of the strong constraint of ΔmBd. Contrarily, in scenario II we can figure out the parameter space in which the CA can be enhanced to the value observed by DØ with the constraint of ΔmBs due to the enhancement of Γs12. In the parameter space we obtained, the correlation between ΔΓs and ϕs is consistent with the current CDF and DØ results.