title: Gauge theory for baryon and lepton numbers with leptoquarks.
abstract: Models where the baryon (B) and lepton (L) numbers are local gauge symmetries that are spontaneously broken at a low scale are revisited. We find new extensions of the standard model which predict the existence of fermions that carry both baryon and lepton numbers (i.e., leptoquarks). The local baryonic and leptonic symmetries can be broken at a scale close to the electroweak scale and we do not need to postulate the existence of a large desert to satisfy the experimental constraints on baryon number violating processes like proton decay.
authors.affiliation: Particle and Astro-Particle Physics Division, Max Planck Institute for Nuclear Physics (MPIK), Saupfercheckweg 1, 69117 Heidelberg, Germany.
authors.forename: Michael
authors.initials: M
authors.lastname: Duerr
authors.affiliation: Particle and Astro-Particle Physics Division, Max Planck Institute for Nuclear Physics (MPIK), Saupfercheckweg 1, 69117 Heidelberg, Germany.
authors.forename: Pavel
authors.initials: P
authors.lastname: Fileviez Pérez
authors.affiliation: California Institute of Technology, Pasadena, California 91125, USA.
authors.forename: Mark B
authors.initials: MB
authors.lastname: Wise