Search results for "lepton: coupling"

showing 2 items of 2 documents

Search for a Dark Leptophilic Scalar in e(+) e(-) Collisions

2020

Many scenarios of physics beyond the standard model predict the existence of new gauge singlets, which might be substantially lighter than the weak scale. The experimental constraints on additional scalars with masses in the MeV to GeV range could be significantly weakened if they interact predominantly with leptons rather than quarks. At an e+e- collider, such a leptophilic scalar (φL) would be produced predominantly through radiation from a τ lepton. We report herein a search for e+e-→τ+τ-φL, φL→ℓ+ℓ- (ℓ=e, μ) using data collected by the BABAR experiment at SLAC. No significant signal is observed, and we set limits on the φL coupling to leptons in the range 0.04<mφL<7.0 GeV. These bounds s…

:Kjerne- og elementærpartikkelfysikk: 431 [VDP]Electron–positron annihilationPhysics beyond the Standard ModelGeneral Physics and Astronomy01 natural sciencesElementary particlecurrent: constraintE+e- collider[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]HEP BaBarMathematical physicsPhysicstau: pair productionnew physics: search forSettore FIS/01 - Fisica Sperimentalescale: electroweak interactionelectron positron: colliding beamsModel estàndard (Física nuclear)Standard model (Nuclear physics)Monte Carlo method:Nuclear and elementary particle physics: 431 [VDP]The standard modelConfidence levelPEP-IIAnomalous magnetic momentleptonic decayScalar (mathematics)lepton: couplinganomalycoupling constant: upper limitelectron positron: annihilationNOMagnetic momentBABAR experimentlepton: coupling: high0103 physical sciencesParameter spaceBaBar; PEP-II; Rare decays;singlet: gauge010306 general physicsMètode de Montecarlomuon: magnetic momentHigh Energy Physics::PhenomenologyRare decaysSLAC PEP StorRare decay[PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph]BaBarElementary Particles and FieldsHigh Energy Physics::ExperimentLeptonexperimental results
researchProduct

Recommendations of the LHC Dark Matter Working Group: Comparing LHC searches for dark matter mediators in visible and invisible decay channels and ca…

2019

Physics of the Dark Universe 26, 100377 (2019). doi:10.1016/j.dark.2019.100377

transverse momentum: missing-energyscale: TeVAtomic01 natural sciencesParticle and Plasma Physics[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]scattering [p p]TeV [scale]010303 astronomy & astrophysicsPhysicsLarge Hadron ColliderCMSPhysicsaxial-vectorMonte Carlo [numerical calculations]ATLASCERN LHC Collinterpretation of experimentsrelic density [dark matter]colliding beams [p p]numerical calculations: Monte CarloAstronomical and Space SciencessignatureParticle physicsp p: scatteringDark matterlepton: couplingdark matter: production5300103 physical sciencesThermalNuclearddc:530Pseudovector010308 nuclear & particles physicsdark matter: relic densityMolecularAstronomy and Astrophysicsmediation [dark matter]dark matter: mediationproduction [dark matter]Space and Planetary Sciencemissing-energy [transverse momentum][PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph]invisible decaycoupling [lepton][PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]p p: colliding beamsvectorLeptonexperimental results
researchProduct