Lepton flavor violating {mu}{yields}e{gamma} and {mu}-e conversion in unparticle physics

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

DOI:https://doi.org/10.1103/PHYSREVD.77.014005· OSTI ID:21035688

Guijun, Ding ^[1]; Mulin, Yan ^[1]

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1. Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026 (China)

We have studied the lepton flavor violating processes {mu}{yields}e{gamma} and {mu}-e conversion in nuclei induced by unparticle. Both Br({mu}{yields}e{gamma}) and the {mu}-e conversion rate CR({mu}-e,Nuclei) strongly depend on the scale dimension d{sub U} and the unparticle coupling {lambda}{sub K}{sup ff{sup '}} (K=V, A, S, P). Present experimental upper bounds on Br({mu}{yields}e{gamma}), CR({mu}-e,Ti), and CR({mu}-e,Au) put stringent constraints on the parameters of unparticle physics. The scale dimensions d{sub U} around 2 are favored for the unparticle scale {lambda}{sub U} of O(10 TeV) and the unparticle coupling of O(10{sup -3}). CR({mu}-e,Nuclei) is proportional to Z{sub eff}{sup 4}A{sup 2}/Z for the pure vector and scalar couplings between unparticle and SM fermions; this peculiar atomic number dependence can be used to distinguish unparticle from other theoretical models.

• OSTI ID: 21035688
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 1 Vol. 77; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ATOMIC NUMBER
BRANCHING RATIO
COUPLING
ELECTRONS
FLAVOR MODEL
LEPTONS
MUONS
PARTICLE DECAY
PHOTONS
SCALARS
SCALE DIMENSION
STANDARD MODEL
TEV RANGE