Direct CP violation of $B \to l ν$ in unparticle physics
| dc.creator | Huang, Chao-Shang | |
| dc.creator | Wu, Xiao-Hong | |
| dc.date | 2007-07-09 | |
| dc.date | 2008-03-24 | |
| dc.date.accessioned | 2026-07-07T11:41:26Z | |
| dc.date.available | 2026-07-07T11:41:26Z | |
| dc.description | We have investigated the effects of unparticles in decays $B \to l ν$. It is found that the direct CP violation in the decays, which is zero in SM, can show up due to the CP conserving phase intrinsic in unparticle physics. For $l=τ$, the direct CP asymmetry can reach 30% for the scalar unparticle contribution, and 100% for the longitudinal vector unparticle contribution under the constraints of ${\rm Br}(B\toτν)$ and $νe$ elastic scattering. If both unparticle-lepton coupling universality and unparticle-quark coupling universality are assumed the constraint from $Br(π\to μν)$ leads that the direct CP violation in $B\to lν$ can only reach at most 8% and 1% for scalar and vector unparticle contributions respectively if $d_{\cal U} < 2$. If the direct CP violation is observed in the future it would give strong evidence for the existence of unparticle stuff. | |
| dc.description | 9 pages, 2 figures, to appear in PRD | |
| dc.identifier | https://arxiv.org/abs/0707.1268 | |
| dc.identifier | http://arxiv.org/abs/0707.1268 | |
| dc.identifier | Phys.Rev.D77:075014,2008 | |
| dc.identifier | doi:10.1103/PhysRevD.77.075014 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/200534 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Direct CP violation of $B \to l ν$ in unparticle physics | |
| dc.type | text |