Proton annihilation at hadron colliders and Kamioka: high-energy versus high-luminosity

Abstract

We examine models and prospects for proton annihilation to dileptons, a process which violates baryon and lepton number each by two. We determine that currently Super-Kamiokande would place the most draconian bound on $pp\to {\ell }^{+}{\ell }^{+}$, ruling out new physics below a scale of $\sim 1.6$ TeV. We also find present and future hadron collider sensitivity to these processes. While 8 TeV LHC data excludes new physics at a scale below $\sim 800$ GeV, the reach of a 14 TeV LHC run is $\sim 1.8$ TeV, putting it on par with the sensitivity of Super-Kamiokande. On the other hand, a 100 TeV proton-proton collider would be sensitive to proton annihilation at a scale up to 10 TeV, allowing it to far exceed the reach of both Super-Kamiokande and the projected 2 TeV reach of Hyper-Kamiokande. Constraints from neutron star observation and cosmological evolution are not competitive. Therefore, although high-luminosity water Cherenkov experiments currently place the leading bounds on baryon and lepton number violation, next generation high-energy hadron colliders will begin surpassing them in sensitivity to some $B/L$-violating processes.

21 pages, 3 figures

References in corpus (16)

• PYTHIA 6.4 Physics and Manual
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Testing Electroweak Baryogenesis with Future Colliders
• Neutralino Dark Matter at 14 and 100 TeV
• Search for the associated production of the Higgs boson with a top-quark pair
• Search for Proton Decay via $p\to \nu K^{+}$ using 260 kiloton$\cdot$year data of Super-Kamiokande
• Simplified models with baryon number violation but no proton decay
• Displaced Supersymmetry
• Search for direct pair production of the top squark in all-hadronic final states in proton-proton collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Search for supersymmetry at sqrt(s)=8 TeV in final states with jets and two same-sign leptons or three leptons with the ATLAS detector
• Prospects for Electroweakino Discovery at a 100 TeV Hadron Collider
• Boosting Stop Searches with a 100 TeV Proton Collider
• Aspects of Jets at 100 TeV
• Supersymmetric Crevices: Missing Signatures of RPV at the LHC
• The Electroweak Vacuum Angle
• Neutron Star Formation and Birth Properties

Cited by in corpus (4)

• Neutron Stars with Baryon Number Violation, Probing Dark Sectors
• An EFT toolbox for baryon and lepton number violating dinucleon to dilepton decays
• $\Delta B=2$ neutron decay into antiproton mode $n\to \bar{p}{e}^{+}\nu (\bar{\nu })$
• Simple models with both baryon and lepton number violation by two units