Extra Higgs bosons in tt production at the LHC

Journal Article · Thu Apr 01 04:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.075019· OSTI ID:21409520

Barcelo, Roberto; Masip, Manuel ^[1]

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1. CAFPE and Departamento de Fisica Teorica y del Cosmos, Universidad de Granada, E-18071, Granada (Spain)

The top quark has a large Yukawa coupling with the Higgs boson. In the usual extensions of the standard model the Higgs sector includes extra scalars, which also tend to couple strongly with the top quark. Unlike the Higgs, these fields have a natural mass above 2m{sub t}, so they could introduce anomalies in tt production at the LHC. We study their effect on the tt invariant mass distribution at {radical}(s)=7 TeV. We focus on the bosons (H,A) of the minimal supersymmetric model and on the scalar field (r) associated with the new scale f in Little Higgs (LH) models. We show that in all cases the interference with the standard amplitude dominates over the narrow-width contribution. As a consequence, the mass difference between H and A or the contribution of an extra T-quark loop in LH models becomes an important effect in order to determine if these fields are observable there. We find that a 1 fb{sup -1} luminosity could probe the region tan{beta}{<=}3 of supersymmetry and v/({radical}(2)f){>=}0.3 in LH models.

• OSTI ID: 21409520
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 7 Vol. 81; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
AMPLITUDES
BOSONS
CERN LHC
CYCLIC ACCELERATORS
DISTRIBUTION
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
FIELD THEORIES
GRAND UNIFIED THEORY
HIGGS BOSONS
INTERFERENCE
LUMINOSITY
MASS
MASS DIFFERENCE
MASS DISTRIBUTION
MATHEMATICAL MODELS
NUCLEAR POTENTIAL
OPTICAL PROPERTIES
PARTICLE MODELS
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
POSTULATED PARTICLES
POTENTIALS
QUANTUM FIELD THEORY
QUARKS
SCALAR FIELDS
SIMULATION
SPATIAL DISTRIBUTION
STANDARD MODEL
STORAGE RINGS
SUPERSYMMETRY
SYMMETRY
SYNCHROTRONS
T QUARKS
TEV RANGE
TEV RANGE 01-10
TOP PARTICLES
UNIFIED GAUGE MODELS
YUKAWA POTENTIAL