Left-right symmetry at LHC

Journal Article · Wed Sep 01 04:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.82.055022· OSTI ID:21421073

Maiezza, Alessio ^[1]; Nemevsek, Miha ^[2]; Nesti, Fabrizio ^[3]; Senjanovic, Goran ^[4]

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1. Dipartimento di Fisica, Universita dell'Aquila, via Vetoio, I-67010, L'Aquila, and INFN-LNGS, Assergi, I-67010, L'Aquila (Italy)
2. II. Institut fuer Theoretische Physik, Universitaet Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany, and Jozef Stefan Institute, 1000 Ljubljana (Slovenia)
3. Dipartimento di Fisica, Universita di Ferrara, via Saragat 1, I-44100, Ferrara (Italy)
4. ICTP, strada Costiera 11, I-34151, Trieste (Italy)

We revisit the issue of the limit on the scale of left-right symmetry breaking. We focus on the minimal SU(2){sub L}xSU(2){sub R}xU(1){sub B-L} gauge theory with the seesaw mechanism and discuss the two possibilities of defining left-right symmetry as parity or charge conjugation. In the commonly adopted case of parity, we perform a complete numerical study of the quark mass matrices and the associated left and right mixing matrices without any assumptions usually made in the literature about the ratio of vacuum expectation values. We find that the usual lower limit on the mass of the right-handed gauge boson from the K mass difference, M{sub W{sub R}}>2.5 TeV, is subject to a possible small reduction due to the difference between right and left Cabibbo angles. In the case of charge conjugation the limit on M{sub W{sub R}} is somewhat more robust. However, the more severe bounds from CP-violating observables are absent in this case. In fact, the free phases can also resolve the present mild discrepancy between the standard model and CP violation in the B sector. Thus, even in the minimal case, both charged and neutral gauge bosons may be accessible at the Large Hadron Collider with spectacular signatures of lepton number violation.

• OSTI ID: 21421073
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 5 Vol. 82; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
BOSONS
CABIBBO ANGLE
CERN LHC
CP INVARIANCE
CYCLIC ACCELERATORS
ENERGY RANGE
FERMIONS
FIELD THEORIES
GAUGE INVARIANCE
GRAND UNIFIED THEORY
INVARIANCE PRINCIPLES
LEPTON NUMBER
LIE GROUPS
MASS
MASS DIFFERENCE
MATHEMATICAL MODELS
MATHEMATICS
MIXING
NUMERICAL ANALYSIS
PARITY
PARTICLE MODELS
PARTICLE PROPERTIES
QUANTUM FIELD THEORY
QUARKS
STANDARD MODEL
STORAGE RINGS
SU GROUPS
SU-2 GROUPS
SYMMETRY
SYMMETRY BREAKING
SYMMETRY GROUPS
SYNCHROTRONS
TEV RANGE
TEV RANGE 01-10
U GROUPS
U-1 GROUPS
UNIFIED GAUGE MODELS