Are there really no experimental limits on a light Higgs boson from kaon decay

Journal Article · Wed Nov 01 04:00:00 EST 1989 · Physical Review (Section) D: Particles and Fields; (USA)

DOI:https://doi.org/10.1103/PhysRevD.40.2980· OSTI ID:5017422

Cheng, H; Yu, H ^[1]

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1. Institute of Physics, Academia Sinica, Taipei, Taiwan 11529, Republic of China (TW)

We reexamine the theoretical estimates of the decay {ital K}{r arrow}{pi}{ital H} and the experimental constraints on the existence of a light Higgs boson from this process. We find that (i) pole diagrams generated from the Higgs-boson--gluon coupling via a loop of heavy quarks do contribute to {ital K}{r arrow}{pi}{ital H}, (ii) there is an additional contribution to the {ital K}{r arrow}{pi}{ital H} amplitude coming from the effective {ital KHW} and {pi}{ital HW} couplings, (iii) even if {ital B}, the unknown parameter in the chiral-Lagrangian description of {ital K}{endash}{pi}{ital H} transitions, is nonzero and even if the real part of the {ital K}{r arrow}{pi}{ital H} amplitude is canceled accidentally, the imaginary contribution alone suffices to rule out a Higgs boson lighter than 2{ital m}{sub {pi}}, and (iv) whether Higgs bosons in the mass range 2{ital m}{sub {pi}}{lt}m{sub H}{lt}350 MeV are excluded by the imaginary part of the {ital K}{r arrow}{pi}{ital H} amplitude depends on the branching ratio of {ital H}{r arrow}{mu}{sup +}{mu}{sup {minus}} and the top-quark mass. Decay modes {ital K}{sub {ital L}}{r arrow}{pi}{sup +}{pi}{sup {minus}}H and {ital K}{sup +}{r arrow}l{sup +}{nu}H are briefly discussed.

• OSTI ID: 5017422
• Journal Information: Physical Review (Section) D: Particles and Fields; (USA), Journal Name: Physical Review (Section) D: Particles and Fields; (USA) Vol. 40:9; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

645204* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Strong Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BOSONS
BRANCHING RATIO
CP INVARIANCE
DECAY
ELECTRONS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
FUNCTIONS
HADRONS
HIGGS BOSONS
INVARIANCE PRINCIPLES
KAONS
KOBAYASHI-MASKAWA MATRIX
LAGRANGIAN FUNCTION
LEPTONS
MASS
MATHEMATICAL MODELS
MATRICES
MESONS
PARTICLE MODELS
PARTICLE PRODUCTION
PIONS
POSITRONS
POSTULATED PARTICLES
PSEUDOSCALAR MESONS
QUARKS
STANDARD MODEL
STRANGE MESONS
STRANGE PARTICLES
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES