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HIGHER-ORDER LORENTZ-INVARIANCE VIOLATION, QUANTUM GRAVITY AND FINE-TUNING

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dc.creatorCARLOS MARAT REYES MARTÍNEZ
dc.date2015
dc.date.accessioned2025-01-10T14:41:13Z
dc.date.available2025-01-10T14:41:13Z
dc.date.issued2015
dc.description.abstractTHE ISSUE OF LORENTZ FINE-TUNING IN EFFECTIVE THEORIES CONTAINING HIGHER-ORDER OPERATORS IS STUDIED. TO THIS END, WE FOCUS ON THE MYERS?POSPELOV EXTENSION OF QED WITH DIMENSION-FIVE OPERATORS IN THE PHOTON SECTOR AND STANDARD FERMIONS. WE COMPUTE THE FERMION SELF-ENERGY AT ONE-LOOP ORDER CONSIDERING ITS EVEN AND ODD CPT CONTRIBUTIONS. IN THE EVEN SECTOR WE FIND SMALL RADIATIVE CORRECTIONS TO THE USUAL PARAMETERS OF QED WHICH ALSO TURN TO BE FINITE. IN THE ODD SECTOR THE AXIAL OPERATOR IS SHOWN TO CONTAIN UNSUPPRESSED EFFECTS OF LORENTZ VIOLATION LEADING TO A POSSIBLE FINE-TUNING. WE USE DIMENSIONAL REGULARIZATION TO DEAL WITH THE DIVERGENCIES AND A GENERIC PREFERRED FOUR-VECTOR. TAKING THE FIRST STEPS IN THE RENORMALIZATION PROCEDURE FOR LORENTZ VIOLATING THEORIES WE ARRIVE TO ACCEPTABLE SMALL CORRECTIONS ALLOWING TO SET THE BOUND .
dc.formatapplication/pdf
dc.identifier.doi10.1016/j.physletb.2015.05.006
dc.identifier.issn1873-2445
dc.identifier.issn0370-2693
dc.identifier.urihttps://repositorio.ubiobio.cl/handle/123456789/8520
dc.languagespa
dc.publisherPHYSICS LETTERS B
dc.relation.uri10.1016/j.physletb.2015.05.006
dc.rightsPUBLICADA
dc.subjectQED EXTENSION
dc.subjectLORENTZ VIOLATIONS
dc.subjectHIGHER-ORDER OPERATORS
dc.titleHIGHER-ORDER LORENTZ-INVARIANCE VIOLATION, QUANTUM GRAVITY AND FINE-TUNING
dc.typeARTÍCULO
dspace.entity.typePublication
ubb.EstadoPUBLICADA
ubb.Otra ReparticionDEPARTAMENTO DE CIENCIAS BASICAS
ubb.SedeCHILLÁN
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