Prompt neutrinos and intrinsic charm at SHiP

A bstract We present a new evaluation of the far-forward neutrino plus antineutrino flux and number of events from charm hadron decays in a 400 GeV proton beam dump experiment like the Search for Hidden Particles (SHiP). Using next-to-leading order perturbative QCD and a model for intrinsic charm, w...

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Bibliographic Details
Published inThe journal of high energy physics Vol. 2019; no. 2; pp. 1 - 40
Main Authors Bai, Weidong, Reno, Mary Hall
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.02.2019
Springer Nature B.V
Springer Berlin
SpringerOpen
Subjects
Angular distribution
Angular momentum
Charm (particle physics)
Classical and Quantum Gravitation
Decay
Elementary Particles
Flux
Heavy Quark Physics
High energy physics
Kinematics
Neutrino Physics
Neutrinos
Physics
Physics and Astronomy
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Proton beams
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Regular Article - Theoretical Physics
Relativity Theory
String Theory
Transverse momentum
Neutrino Physics
Heavy Quark Physics
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Summary:A bstract We present a new evaluation of the far-forward neutrino plus antineutrino flux and number of events from charm hadron decays in a 400 GeV proton beam dump experiment like the Search for Hidden Particles (SHiP). Using next-to-leading order perturbative QCD and a model for intrinsic charm, we include intrinsic transverse momentum effects and other kinematic angular corrections. We compare this flux to a far-forward flux evaluated with next-to-leading order perturbative QCD, without intrinsic transverse momentum, that used the angular distribution of charm quarks rather than the neutrinos from their decays. The tau neutrino plus antineutrino number of events in the perturbative QCD evaluation is reduced by a factor of about three when intrinsic transverse momentum and the full decay kinematics are included. We show that intrinsic charm contributions can significantly enhance the number of events from neutrinos from charm hadron decays. Measurements of the number of events from tau neutrino plus antineutrino interactions and of the muon charge asymmetry as a function of energy can be used to constrain intrinsic charm models.
Bibliography:USDOE Office of Science (SC), High Energy Physics (HEP)
SC0010113
ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP02(2019)077