Effective fermion-Higgs interactions at an e⁺e⁻ collider with polarized beams
| dc.contributor.author | Huitu, K. | |
| dc.contributor.author | Rao, K. | |
| dc.contributor.author | Rindani, S. | |
| dc.contributor.author | Sharma, P. | |
| dc.date.issued | 2016 | |
| dc.description.abstract | We consider the possibility of new physics giving rise to effective interactions of the form e<sup>+</sup>e<sup>−</sup>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<sup>+</sup>e<sup>−</sup>→Hℓ<sup>+</sup>ℓ<sup>−</sup> and e<sup>+</sup>e<sup>−</sup>→Hqq¯ at a future e<sup>+</sup>e<sup>−</sup> 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<sup>+</sup>e<sup>−</sup>→Hℓ<sup>+</sup>ℓ<sup>−</sup> and e<sup>+</sup>e<sup>−</sup>→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<sup>−1</sup>. 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. | |
| dc.description.statementofresponsibility | Katri Huitu, Kumar Rao, Saurabh D.Rindani, Pankaj Sharma | |
| dc.identifier.citation | Nuclear Physics B, 2016; 911:274-294 | |
| dc.identifier.doi | 10.1016/j.nuclphysb.2016.08.004 | |
| dc.identifier.issn | 0550-3213 | |
| dc.identifier.issn | 1873-1562 | |
| dc.identifier.orcid | Sharma, P. [0000-0003-1873-1349] | |
| dc.identifier.uri | http://hdl.handle.net/2440/106999 | |
| dc.language.iso | en | |
| dc.publisher | Elsevier | |
| dc.relation.grant | http://purl.org/au-research/grants/arc/CE1101004 | |
| dc.rights | © 2016 The Author(s). Published by Elsevier B.V. Open Access funded by SCOAP³ - Sponsoring Consortium for Open Access | |
| dc.source.uri | https://doi.org/10.1016/j.nuclphysb.2016.08.004 | |
| dc.title | Effective fermion-Higgs interactions at an e⁺e⁻ collider with polarized beams | |
| dc.title.alternative | Effective fermion-Higgs interactions at an e(+)e(-) collider with polarized beams | |
| dc.type | Journal article | |
| pubs.publication-status | Published |