Higgs studies in polarized gamma-gamma collisions

Abstract

The study of an intermediate mass Higgs boson, via the process gamma-gamma -> H -> bbbar from an initiallypolarized J_z = 0 state, has been advocated as an important feasible goal of a future photon linear collider. The crucial argument was the m_b^2/s suppression of the background process gamma-gamma (J_z = 0) -> bbbar. We critically review the contribution of the radiative background processes (in which the m_b^2/s suppression is absent) to the quasi-two-jet-like events with at least one, but preferably two, tagged energetic b jets. Within a complete study of the radiative processes, we find that a sizeable background contribution can come from the helicity-violating gamma-gamma (J_z = 0) -> bbbar process accompanied by soft gluon emission. These latter radiative corrections contain a new type of double logarithmic (DL) terms. We clarify the physical nature of these novel DL corrections. Despite the fact that the one-loop DL terms are comparable or even larger than the Born term, fortunately we find that the calculation of the cross section in the two-loop approximation is sufficient for a reliable evaluation of the background to the Higgs signal.

36 pages of Latex file + 10 psfiles with figures

Cited by in corpus (27)

• The Anatomy of Electro-Weak Symmetry Breaking. I: The Higgs boson in the Standard Model
• Studying the MSSM Higgs sector by forward proton tagging at the LHC
• Production of MSSM Higgs Bosons in Photon-Photon Collisions
• Diffractive gamma-gamma production at hadron colliders
• Higgs Boson Production at the Compton Collider
• High-Energy Limit of Quantum Electrodynamics beyond Sudakov Approximation
• All-Orders Resummation of Leading Logarithmic Contributions to Heavy Quark Production in Polarized γγCollisions
• On the resummation of double logarithms in the process Higgs --> two photons
• On radiative QCD backgrounds to exclusive H -> b bbar production at the LHC and a photon collider
• Higgs Boson Decay into Hadronic Jets
• Renormalization Group Improved Heavy Quark Production in Polarized γγCollisions
• On the Resummation of Large QCD Logarithms in Higgs -> 2 Photons Decay
• One-loop gg->bb(bar) effects in the main irreducible background to exclusive H->bb(bar) production at the LHC
• Resonance--Continuum Interference in Light Higgs Boson Production at a Photon Collider
• Radiative QCD backgrounds to exclusive H -> bb(bar) production: radiation from the screening gluon
• Higgs Search in the WW* Decay Mode at Photon Linear Colliders
• Resummation of double logarithms in loop-induced processes with effective field theory
• Heavy neutral MSSM Higgs Bosons at the PLC - a comparison of two analyses
• Analytically expanded and integrated results for massive fermion production in two-photon collisions and a high precision alpha_s determination
• Precision Higgs physics at a $\gamma \gamma$ collider
• Heavy Quark Pair Production in Polarized Photon--Photon Collisions
• Production of MSSM Higgs Bosons in $\gamma \gamma$ Collisions
• Renormalization Group Effects in the Process $H⟶\gamma \gamma$
• On the polarization of fermion in an intermediate state
• Precise measurement of $\Gamma (H⟶\gamma \gamma )$ at a PLC and theoretical consequences
• On the Resummation of Large QCD Corrections to photon photon to b anti-b
• Double logarithmical corrections to beam asymmetry in polarized electron-proton scattering