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https://hdl.handle.net/2440/106999
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Type: | Journal article |
Title: | Effective fermion-Higgs interactions at an e⁺e⁻ collider with polarized beams |
Other Titles: | Effective fermion-Higgs interactions at an e(+)e(-) collider with polarized beams |
Author: | Huitu, K. Rao, K. Rindani, S. Sharma, P. |
Citation: | Nuclear Physics B, 2016; 911:274-294 |
Publisher: | Elsevier |
Issue Date: | 2016 |
ISSN: | 0550-3213 1873-1562 |
Statement of Responsibility: | Katri Huitu, Kumar Rao, Saurabh D.Rindani, Pankaj Sharma |
Abstract: | We consider the possibility of new physics giving rise to effective interactions of the form e+e−Hff¯, where f represents a charged lepton ℓ or a (light) quark q, and H the recently discovered Higgs boson. Such vertices would give contributions beyond the standard model to the Higgs production processes e+e−→Hℓ+ℓ− and e+e−→Hqq¯ at a future e+e− collider. We write the most general form for these vertices allowed by Lorentz symmetry. Assuming that such interactions contribute in addition to the standard model production processes, where the final-state fermion pair comes from the decay of the Z boson, we obtain the differential cross section for the processes e+e−→Hℓ+ℓ− and e+e−→Hqq¯ to linear order in the effective interactions. We propose several observables with differing CP and T properties which, if measured, can be used to constrain the couplings occurring in interaction vertices. We derive possible limits on these couplings that may be obtained at a collider with centre-of-mass energy of 500 GeV and an integrated luminosity of 500 fb−1. We also carry out the analysis assuming that both the electron and positron beams can be longitudinally polarized, and find that the sensitivity to the couplings can be improved by a factor of 2–4 by a specific choice of the signs of the polarizations of both the electron and positron beams for the same integrated luminosity. |
Rights: | © 2016 The Author(s). Published by Elsevier B.V. Open Access funded by SCOAP³ - Sponsoring Consortium for Open Access |
DOI: | 10.1016/j.nuclphysb.2016.08.004 |
Grant ID: | http://purl.org/au-research/grants/arc/CE1101004 |
Published version: | http://dx.doi.org/10.1016/j.nuclphysb.2016.08.004 |
Appears in Collections: | Aurora harvest 3 Mathematical Sciences publications |
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