Rindani, Saurabh D. ; Sharma, Pankaj (2009) Angular distributions as a probe of anomalous ZZH and γZH interactions at a linear collider with polarized beams Physical Review D - Particles, Fields, Gravitation and Cosmology, 79 (7). 075007_1-075007 _11. ISSN 1550-7998
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Official URL: http://prd.aps.org/abstract/PRD/v79/i7/e075007
Related URL: http://dx.doi.org/10.1103/PhysRevD.79.075007
Abstract
We examine the contribution of general Z∗ZH and γ∗ZH three-point interactions arising from new physics to the Higgs production process e+e−→HZ. From Lorentz covariance, each of these vertices may be written in terms of three (complex) form factors, whose real and imaginary parts together make six independent couplings. We take into account possible longitudinal or transverse beam polarization likely to be available at a linear collider. We show how partial cross sections and angular asymmetries in suitable combinations with appropriate beam polarizations can be used to disentangle various couplings from one another. A striking result is that using transverse polarization, one of the γZH couplings, not otherwise accessible, can be determined independently of all other couplings. Transverse polarization also helps in the independent determination of a combination of two other couplings, in contrast to a combination of four accessible with unpolarized or longitudinally polarized beams. We also obtain the sensitivity of the various observables in constraining the new-physics interactions at a linear collider operating at a center-of-mass energy of 500 GeV with longitudinal or transverse polarization.
Item Type: | Article |
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Source: | Copyright of this article belongs to The American Physical Society. |
ID Code: | 43609 |
Deposited On: | 14 Jun 2011 10:25 |
Last Modified: | 18 May 2016 00:32 |
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