Super-light baryphotons, Weak Gravity Conjecture and Exotic instantons in Neutron-Antineutron transitions

Abstract

In companion papers \cite{Addazi:2015pia,Addazi:2016rgo}, we have discussed current bounds of a new super-light baryo-photon, associated to a $U(1{)}_{B-L}$ gauged, from neutron-antineutron current data, which are competitive with Eötvös type experiments. Here, we discuss the implications of a possible baryo-photon detection in string theory and quantum gravity. The discovery of a very light gauge boson should imply the violation of the Weak Gravity Conjecture, carrying deep consequences in our understanding of holography, quantum gravity and black holes. On the other hand, we show how the detection of a baryo-photon would also exclude the generation of all $B-L$ violating operators from Exotic Stringy Instantons. We will disclaim the common statement in literature that neutron-antineutron may indirectly test at least a $300-1000\mathrm{TeV}$ scale. Searches of baryo-photons can provide indirect informations of the Planck (or String) scale (quantum black holes, holography and non-perturbative stringy effects). This strongly motivates new neutron-antineutron experiments with adjustable magnetic fields dedicated to the detection of super-light baryo-photons.

References in corpus (17)

• Dynamics of dark energy
• Dark Energy and the Accelerating Universe
• Spacetime Instanton Corrections in 4D String Vacua - The Seesaw Mechanism for D-Brane Models
• Neutrino Majorana Masses from String Theory Instanton Effects
• Instanton Induced Neutrino Majorana Masses in CFT Orientifolds with MSSM-like spectra
• Non-perturbative Yukawa Couplings from String Instantons
• Decaying warm dark matter and neutrino masses
• Lifting D-Instanton Zero Modes by Recombination and Background Fluxes
• Inflation and majoron dark matter in the seesaw mechanism
• The Weinberg Operator and a Lower String Scale in Orientifold Compactifications
• Neutron Majorana mass from exotic instantons
• String completion of an $\mathrm{SU}(3{)}_{\mathrm{c}}\otimes \mathrm{SU}(3{)}_{\mathrm{L}}\otimes \mathrm{U}(1{)}_{\mathrm{X}}$ electroweak model
• 'Exotic vector-like pair' of color-triplet scalars
• Way-out to the Gravitino problem in intersecting D-brane Pati-Salam models
• Neutron-antineutron oscillations beyond the quasi-free limit
• D-brane instanton induced mu-terms and their hierarchical structure
• Weak Gravity Conjecture as a Razor Criterium for Exotic D-brane instantons

Cited by in corpus (1)

• Hitchhiker's Guide to the Swampland: The Cosmologist's Handbook to the string-theoretical Swampland Programme