Abstract
The discovery or exclusion of the fundamental standard scalar is a hot topic, given the data of LEP, the Tevatron and the LHC, as well as the advanced status of the pertinent theoretical calculations. With the current statistics at the hadron colliders, the workhorse decay channel, at all relevant H masses, is H → W W, followed by W → ℓν, ℓ = e or μ. Using phase-space singularity techniques, we construct and study a plethora of “singularity variables” meant to facilitate the difficult tasks of separating signal and backgrounds and of measuring the mass of a putative signal. The simplest singularity variables are not invariant under boosts along the pp or \( p\overline p \) axes and the simulation of their distributions requires a good understanding of parton distribution functions, perhaps not a serious shortcoming during the boson hunting season. The derivation of longitudinally boost-invariant variables, which are functions of the four charged-lepton observables that share this invariance, is quite elaborate. But their use is simple and they are, in a kinematical sense, optimal.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
G. Tonelli, Update on the Standard Model Higgs searches in CMS, talks given at CERN Public Seminar, Geneva, Switzerland, 13 December 2011, http://indico.cern.ch/conferenceDisplay.py?confId=164890.
F. Gianotti, Update on the Standard Model Higgs searches in ATLAS, talks given at CERN Public Seminar, Geneva, Switzerland, 13 December 2011, http://indico.cern.ch/conferenceDisplay.py?confId=164890.
ATLAS collaboration, G. Aad et al., Combined search for the Standard Model Higgs boson using up to 4.9 f b −1 of pp collision data at \( \sqrt {s} = {7 }TeV \) with the ATLAS detector at the LHC, Phys. Lett. B 710 (2012) 49 [CERN-PH-EP-2012-019] [arXiv:1202.1408] [INSPIRE].
CMS collaboration, S. Chatrchyan et al., Combined results of searches for the standard model Higgs boson in pp collisions at \( \sqrt {s} = {7 }TeV \), Phys. Lett. B 710 (2012) 26 [CERN-PH-EP-2012-023] [arXiv:1202.1488] [INSPIRE].
TEVNPH (Tevatron New Phenomina and Higgs Working Group), CDF and D0 collaborations, Combined CDF and D0 Upper Limits on Standard Model Higgs Boson Production with up to 8.6f b −1 of Data, arXiv:1107.5518 [INSPIRE].
LEP Electroweak Working Group, http://lepewwg.web.cern.ch/LEPEWWG/, October 2011.
I.-W. Kim, Algebraic Singularity Method for Mass Measurement with Missing Energy, Phys. Rev. Lett. 104 (2010) 081601 [arXiv:0910.1149] [INSPIRE].
A. Rújula and A. Galindo, Measuring the W-Boson mass at a hadron collider: a study of phase-space singularity methods, JHEP 08 (2011) 023 [arXiv:1106.0396] [INSPIRE].
T. Sjöstrand, S. Mrenna and P.Z. Skands, PYTHIA 6.4 Physics and Manual, JHEP 05 (2006) 026 [hep-ph/0603175] [INSPIRE].
V.D. Barger, A.D. Martin and R. Phillips, Perpendicular e neutrino mass from W decay, Z. Phys. C 21 (1983) 99 [INSPIRE].
J. Smith, W. van Neerven and J. Vermaseren, The transverse mass and width of the W boson, Phys. Rev. Lett. 50 (1983) 1738 [INSPIRE].
N. Cabibbo and A. Maksymowicz, Angular Correlations in K e4 Decays and Determination of Low-Energy π − π Phase Shifts, Phys. Rev. B 137 (1965) 438 [Erratum ibid. B 168 (1968) 1926].
M. Kalkbrener, An upper bound on the number of monomials in the Sylvester resultant, in proceedings of 1993 International Symposium on Symbolic and Algebraic Computation, ACM, New York (1993) 161.
A. De Rújula and A. Galindo, in preparation.
Author information
Authors and Affiliations
Corresponding author
Additional information
ArXiv ePrint: 1202.2552
Rights and permissions
Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License ( https://creativecommons.org/licenses/by/2.0 ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
About this article
Cite this article
De Rújula, A., Galindo, A. Singular ways to search for the Higgs boson. J. High Energ. Phys. 2012, 91 (2012). https://doi.org/10.1007/JHEP06(2012)091
Received:
Revised:
Accepted:
Published:
DOI: https://doi.org/10.1007/JHEP06(2012)091