Off resonance background effects in e+e- -> t anti-t H
arXiv:0803.0887 · doi:10.1016/j.nuclphysb.2008.04.027
Abstract
The top quark Yukawa coupling to the intermediate mass Higgs boson can be determined in the reaction e+e- -> t anti-t H that, after taking into account decays, will be detected at the International Linear Collider through reactions with 8 particles in the final state. Such 2 -> 8 reactions receive contributions from tens thousands of Feynman diagrams, already in the lowest order of Standard Model, most of which comprise background to resonant associated production and decay of the top quark pair and Higgs boson. We illustrate the background effects by comparing cross sections of three reactions, which represent different detection channels of e+e- -> t anti-t H, calculated with the complete sets of the lowest order Feynman diagrams with the corresponding signal cross sections calculated with the diagrams of associated production and decay of off mass shell top quark pair and Higgs boson only. The comparison that is performed with different selections of cuts shows that the background effects are sizeable, but they can be reduced by appropriate choice of cuts.
12 pages, 4 figures, substantially revised version, accepted for publication in Nucl. Phys. B
References in corpus (23)
- Search for the Standard Model Higgs Boson at LEP
- WHIZARD: Simulating Multi-Particle Processes at LHC and ILC
- Predictions for all processes e^+e^- -> 4 fermions + gamma
- TESLA Technical Design Report Part III: Physics at an e+e- Linear Collider
- ILC Reference Design Report Volume 1 - Executive Summary
- Linear Collider Physics Resource Book for Snowmass 2001 - Part 2: Higgs and Supersymmetry Studies
- Full order_alpha electroweak and order alpha_s corrections to e^+e^- --> t t H
- Higgs Radiation off Top Quarks in e^+e^- Collisions
- RacoonWW1.3: A Monte Carlo program for four-fermion production at e^+ e^- colliders
- QCD Corrections to Associated Higgs Boson Production
- QCD Corrections to Associated Higgs Boson-Heavy Quark Production
- Electroweak radiative corrections to at linear colliders
- Measuring the Top Quark Yukawa Coupling at a Linear e^+e^- Collider
- Electroweak radiative corrections to e+ e- -> t anti-t H
- Higgs radiation off quarks in supersymmetric theories at e^+e^- colliders
- Radiative corrections to Higgs-boson production in association with top-quark pairs at e+ e- colliders
- The Large Higgs Energy Region in Higgs Associated Top Pair Production at the Linear Collider
- The process `e+ e- --> H t t-bar' and its backgrounds at future electron-positron colliders
- Next-to-leading-logarithmic QCD Corrections to the Cross Section sigma(e+e- to t bar t H) at 500 GeV
- Top-Higgs Yukawa Coupling Measurement at a Linear e+e- Collider
- eett6f v. 1.0, A program for top quark pair production and decay into 6 fermions at linear colliders
- Search for Low Mass Higgs at the Tevatron
- Top quark couplings at ILC: six and eight fermion final states
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- Single production of the top partners at high energy colliders
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- The Higgs Boson in the Standard Model - From LEP to LHC: Expectations, Searches, and Discovery of a Candidate
- Measuring the Higgs Boson Self-coupling at High Energy e^+e^- Colliders
- 'carlomat', A program for automatic computation of lowest order cross sections
- e+ e- -> t anti-t H including decays: on the size of background contributions
- Probing the top-Higgs coupling through the secondary lepton distributions in the associated production of the top-quark pair and Higgs boson at the LHC
- Current status of CARLOMAT, a program for automatic computation of lowest order cross sections