Unparticles at heavy flavor scales: CP violating phenomena

Journal Article · Fri Feb 01 04:00:00 EST 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.77.036004· OSTI ID:21039065

Zwicky, Roman ^[1]

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1. IPPP, Department of Physics, University of Durham, Durham DH1 3LE (United Kingdom)

Coupling the scale invariant unparticle sector to flavor physics and assuming that it remains scale invariant I investigate its consequences in heavy flavor physics. A characteristic feature of unparticle physics is a CP-even phase leading to novel CP violating phenomena. The phase is large, based on the assumption that the unparticle sector is strongly self-coupled. I consider the CP asymmetry in the leptonic decay B{sup +}{yields}{tau}{sup +}{nu} and the hadronic decay B{sub d}{yields}D{sup +}D{sup -}, taking into account constraints of branching ratios and time dependent CP asymmetries. It turns out that the CP asymmetry can be very large even for small couplings because the unparticle interaction term has a lower scaling dimension than the four-Fermi weak interaction term. CP asymmetries in leptonic decays such as B{sup +}{yields}{tau}{sup +}{nu} are neither experimentally searched for nor predicted by any other model. I show that the novel CP violation is consistent with the CPT theorem. I identify the CP compensating mode in the unparticle sector and explicitly demonstrate the exact cancellation as demanded by the CPT theorem.

• OSTI ID: 21039065
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 3 Vol. 77; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
B PLUS MESONS
BRANCHING RATIO
COUPLING
CP INVARIANCE
CPT THEOREM
D MINUS MESONS
D PLUS MESONS
FLAVOR MODEL
HADRONIC PARTICLE DECAY
LEPTONIC DECAY
TAU NEUTRINOS
TAU PARTICLES
TIME DEPENDENCE