Eur. Phys. J. C 71, 1514 (2011)
https://doi.org/10.1140/epjc/s10052-010-1514-0

Same sign WW scattering process as a probe of Higgs boson in pp collision at √s = 10 TeV

¹ School of Physics, and State Key Laboratory of Nuclear Physics & Technology, Peking University, Beijing, China
² Milano-Bicocca University, Milano, Italy
³ INFN Milano-Bicocca, Milano, Italy
⁴ European Organization for Nuclear Research, Geneva, Switzerland
⁵ INFN Torino, Torino, Italy
⁶ Fermi National Accelerator Laboratory, Batavia, IL, USA

zhub@pku.edu.cn

Received: 19 October 2010
Revised: 25 November 2010
Published online: 8 January 2011

Abstract

WW scattering is an important process to study electroweak symmetry breaking in the Standard Model at the LHC, in which the Higgs mechanism or other new physics processes must intervene to preserve the unitarity of the process below 1 TeV. This channel is expected to be one of the most sensitive to determine whether the Higgs boson exists. In this paper, the final state with two same sign Ws is studied, with a simulated sample corresponding to the integrated luminosity of 60 fb⁻¹ in pp collision at √s = 10  TeV. Two observables, the invariant mass of μμ from W decays and the azimuthal angle difference between the two μs, are utilized to distinguish the Higgs boson existence scenario from the Higgs boson absence scenario. A good signal significance for the two cases can be achieved. If we define the separation power of the analysis as the distance, in the log-likelihood plane, of pseudo-experiments outcomes in the two cases, with the total statistics expected from the ATLAS and CMS experiments at the nominal center-of-mass energy of 14 TeV, the separation power will be at the level of 4 σ.