Abstract
We propose a method for reconstructing the mass of a particle, such as the Higgs boson, decaying into a pair of τ leptons, of which one subsequently undergoes a 3-prong decay. The kinematics is solved using information from the visible decay products, the missing transverse momentum, and the 3-prong τ decay vertex, with the detector resolution taken into account using a likelihood method. The method is shown to give good discrimination between a 125 GeV Higgs boson signal and the dominant backgrounds, such as Z 0 decays to ττ and W ± plus jets production. As a result, we find an improvement, compared to existing methods for this channel, in the discovery potential, as well as in measurements of the Higgs boson mass and production cross section times branching ratio.
Article PDF
Similar content being viewed by others
Explore related subjects
Discover the latest articles, news and stories from top researchers in related subjects.Avoid common mistakes on your manuscript.
References
ATLAS collaboration, Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC, Phys. Lett. B 716 (2012) 1 [arXiv:1207.7214] [INSPIRE].
CMS collaboration, Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC, Phys. Lett. B 716 (2012) 30 [arXiv:1207.7235] [INSPIRE].
ATLAS collaboration, K. Einsweiler, ATLAS status report on SM Higgs search/measurements, talk presented at Hadron Collider Physics symposium 2012 (HCP 2012), ATL-PHYS-SLIDE-2012-706, (2012).
CMS collaboration, C. Paus, Latest on the Higgs from CMS, talk presented at Hadron Collider Physics symposium 2012 (HCP 2012), (2012)
CMS collaboration, Search for the Standard Model Higgs boson decaying to τ pairs, CMS-PAS-HIG-12-043, CERN, Geneva Switzerland (2012).
R.K. Ellis, I. Hinchliffe, M. Soldate and J. van der Bij, Higgs decay to τ + τ − : a possible signature of intermediate mass Higgs bosons at the SSC, Nucl. Phys. B 297 (1988) 221 [INSPIRE].
CMS collaboration, Search for neutral Higgs boson production and decay to τ pairs, CMS-PAS-HIG-10-002, CERN, Geneva Switzerland (2010).
A. Elagin, P. Murat, A. Pranko and A. Safonov, A new mass reconstruction technique for resonances decaying to di-tau, Nucl. Instrum. Meth. A 654 (2011) 481 [arXiv:1012.4686] [INSPIRE].
B. Gripaios, K. Sakurai and B. Webber, Polynomials, Riemann surfaces and reconstructing missing-energy events, JHEP 09 (2011) 140 [arXiv:1103.3438] [INSPIRE].
A.J. Barr, S.T. French, J.A. Frost and C.G. Lester, Speedy Higgs boson discovery in decays to τ lepton pairs: h → τ, τ, JHEP 10 (2011) 080 [arXiv:1106.2322] [INSPIRE].
A.J. Barr, B. Gripaios and C.G. Lester, Finding Higgs bosons heavier than 2m W in dileptonic W -boson decays, Phys. Lett. B 713 (2012) 495 [arXiv:1110.2452] [INSPIRE].
Particle Data Group collaboration, C. Amsler et al., Review of particle physics, Phys. Lett. B 667 (2008) 1 [INSPIRE].
ATLAS collaboration, Expected performance of the ATLAS experiment — detector, trigger and physics, arXiv:0901.0512 [INSPIRE].
K. Kawagoe, M. Nojiri and G. Polesello, A new SUSY mass reconstruction method at the CERN LHC, Phys. Rev. D 71 (2005) 035008 [hep-ph/0410160] [INSPIRE].
M. Bahr et al., HERWIG++ physics and manual, Eur. Phys. J. C 58 (2008) 639 [arXiv:0803.0883] [INSPIRE].
S. Gieseke et al., HERWIG++ 2.5 release note, arXiv:1102.1672 [INSPIRE].
LHC Higgs Cross section Working Group collaboration, S. Dittmaier et al., Handbook of LHC Higgs cross sections: 1. Inclusive observables, arXiv:1101.0593 [INSPIRE].
CMS collaboration, Inclusive W/Z cross section at 8 TeV, SMP-PAS-12-011, CERN, Geneva Switzerland (2012).
D. Grellscheid and P. Richardson, Simulation of τ decays in the HERWIG++ event generator, arXiv:0710.1951 [INSPIRE].
ATLAS collaboration, Measurement of the Z → ττ cross section with the ATLAS detector, Phys. Rev. D 84 (2011) 112006 [arXiv:1108.2016] [INSPIRE].
CMS collaboration, Performance of τ -lepton reconstruction and identification in CMS, 2012 JINST 7 P01001 [arXiv:1109.6034] [INSPIRE].
CMS collaboration, Search for neutral MSSM Higgs bosons decaying to τ pairs in pp collisions at \( \sqrt{s}=7 \) TeV, Phys. Rev. Lett. 106 (2011) 231801 [arXiv:1104.1619] [INSPIRE].
Author information
Authors and Affiliations
Corresponding author
Additional information
ArXiv ePrint: 1210.1938
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
Gripaios, B., Nagao, K., Nojiri, M. et al. Reconstruction of Higgs bosons in the di-tau channel via 3-prong decay. J. High Energ. Phys. 2013, 106 (2013). https://doi.org/10.1007/JHEP03(2013)106
Received:
Revised:
Accepted:
Published:
DOI: https://doi.org/10.1007/JHEP03(2013)106