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A Fast Track towards the `Higgs' Spin and Parity · Around

2012

A Fast Track towards the `Higgs' Spin and Parity

Ellis, John, Hwang, Dae Sung, Sanz, Veronica et al.

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The LHC experiments ATLAS and CMS have discovered a new boson that resembles the long-sought Higgs boson: it cannot have spin one, and has couplings to other particles that increase with their masses, but the spin and parity remain to be determined.

We show here that the `Higgs' + gauge boson invariant-mass distribution in `Higgs'-strahlung events at the Tevatron or the LHC would be very different under the J^P = 0+, 0- and 2+ hypotheses, and could provide a fast-track indicator of the `Higgs' spin and parity.
Our analysis is based on simulations of the experimental event selections and cuts using PYTHIA and Delphes, and incorporates statistical samples of `toy' experiments.

Built on

D. J. Miller, S. Y. Choi, B. Eberle, M. M. Muhlleitner and P. M. Zerwas, Measuring the spin of the Higgs boson,
2001
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R. Cousins, J. Mumford, J. Tucker and V. Valuev, Spin discrimination of new heavy resonances at the LHC
2005
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T. Sjostrand, S. Mrenna and P. Z. Skands, PYTHIA 6.4 Physics and Manual,
2006
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See, for example S. Y. Choi, D. J. . Miller, M. M. Muhlleitner and P. M. Zerwas, Phys. Lett. B 553
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