Phenomenology of flavon fields at the LHC

Journal Article · Mon Feb 01 00:00:00 EST 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.036012· OSTI ID:21409229

Tsumura, Koji; Velasco-Sevilla, Liliana ^[1]

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1. Abdus Salam International Centre for Theoretical Physics, Strada Costiera 11, 34151 Trieste (Italy)

We study low energy constraints from flavor violating processes, production, and decay at the LHC of a scalar field {phi} (flavon) associated to the breaking of a nonsupersymmetric Abelian family symmetry at the TeV scale. This symmetry is constrained to reproduce fermion masses and mixing, up to O(1) coefficients. The nonsupersymmetric gauged U(1) models considered are severely restricted by cancellation of anomalies and LEP bounds on contact interactions; consequently its phenomenology is out of the LHC reach. We therefore introduce an effective U(1) which is not gauged and is broken explicitly by a CP-odd term at the TeV scale. This helps us to explore flavor violating processes, production, and decay at the LHC for these kind of light scalars. In this context we first study the constraints on the flavon mass and its vacuum expectation value from low energy flavor changing processes such as {mu}{yields}e{gamma}. We find that a flavon of about m{sub {phi}}< or approx. 150 GeV could be experimentally allowed. These kinds of flavons could be significantly generated at the LHC via the gluon fusion mechanism and the single top production channel gu{yields}t{phi}. The produced flavons can have characteristic decay modes such as tc for m{sub {phi}}> or approx. m{sub t}, and {tau}{mu} for m{sub {phi}}< or approx. m{sub t}, which could be effectively useful to detect flavons.

• OSTI ID: 21409229
• Journal Information: Physical Review. D, Particles Fields, Vol. 81, Issue 3; Other Information: DOI: 10.1103/PhysRevD.81.036012; (c) 2010 The American Physical Society; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CANCELLATION
CERN LHC
FERMIONS
FLAVOR MODEL
GEV RANGE 100-1000
GLUONS
INTERACTIONS
LEP STORAGE RINGS
MASS
PARTICLE DECAY
SCALAR FIELDS
SYMMETRY
TEV RANGE
U-1 GROUPS
ACCELERATORS
BOSONS
COMPOSITE MODELS
CYCLIC ACCELERATORS
DECAY
ENERGY RANGE
GEV RANGE
LIE GROUPS
MATHEMATICAL MODELS
PARTICLE MODELS
QUARK MODEL
STORAGE RINGS
SYMMETRY GROUPS
SYNCHROTRONS
U GROUPS