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Photon pair production and the intermediate-mass Higgs boson

Journal Article · · Phys. Rev. D; (United States)
;
We study the production of photon pairs at future hadron colliders from quark-antiquark annihilation and gluon fusion via quark loops. We show that gluon fusion is just as important as quark-antiquark annihilation for photon pairs of invariant mass less than 200 GeV, and that the gluon-fusion cross section is twice as large for a light top quark as for a heavy top quark. Photon pairs are an irreducible background to the two-photon decay mode of the Higgs boson, which is important if the Higgs boson is of intermediate mass (m/sub H/<2M/sub W/) and m/sub H/<2m/sub t/, i.e., if its decay to top quarks is kinematically forbidden. If that is the case, we show that the top-quark contribution to the gluon-fusion process is small and, if m/sub H/approx. =2m/sub t/, is even destructive. We also show that a judicious choice of cuts can improve the signal-to-background ratio.
Research Organization:
Center for Particle Theory, University of Texas, Austin, Texas 78712
OSTI ID:
5374743
Journal Information:
Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 37:7; ISSN PRVDA
Country of Publication:
United States
Language:
English

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Related Subjects

645202* -- High Energy Physics-- Particle Interactions &amp; Properties-Theoretical-- Electromagnetic Interactions &amp; Properties
645203 -- High Energy Physics-- Particle Interactions &amp; Properties-Theoretical-- Weak Interactions &amp; Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
BARYON-BARYON INTERACTIONS
BASIC INTERACTIONS
CROSS SECTIONS
DATA
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
HADRON-HADRON INTERACTIONS
HIGGS BOSONS
INFORMATION
INTERACTIONS
MASSLESS PARTICLES
NUCLEON-NUCLEON INTERACTIONS
NUMERICAL DATA
PAIR PRODUCTION
PARTICLE INTERACTIONS
PHOTONS
POSTULATED PARTICLES
PROTON-NUCLEON INTERACTIONS
PROTON-PROTON INTERACTIONS
QUARK-ANTIQUARK INTERACTIONS
THEORETICAL DATA