Using Spin Correlations to Distinguish Zh from ZA at the International Linear Collider

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We investigate how to exploit the spin information imparted to the Z boson in associated Higgs production at a future linear collider as an aid in distinguishing between CP-even and CP-odd Higgs bosons. We apply a generalized spin-basis analysis which allows us to study the possibilities offered by non-traditional choices of spin projection axis. In particular, we find that the Z bosons produced in association with a CP-even Higgs via polarized collisions are in a single transverse spin-state (> 90% purity) when we use the Zh-transverse basis, provided that the Z bosons are not ultra-relativistic (speed < 0.9c). This same ... continued below

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48 pages

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Mahlon, Gregory; /Penn State U., Mont Alto; Parke, Stephen J. & /Fermilab June 1, 2006.

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We investigate how to exploit the spin information imparted to the Z boson in associated Higgs production at a future linear collider as an aid in distinguishing between CP-even and CP-odd Higgs bosons. We apply a generalized spin-basis analysis which allows us to study the possibilities offered by non-traditional choices of spin projection axis. In particular, we find that the Z bosons produced in association with a CP-even Higgs via polarized collisions are in a single transverse spin-state (> 90% purity) when we use the Zh-transverse basis, provided that the Z bosons are not ultra-relativistic (speed < 0.9c). This same basis applied to the associated production of a CP-odd Higgs yields Z's that are an approximately equal mixture of longitudinal and transverse polarizations. We present a decay angular distribution which could be used to distinguish between the CP-even and CP-odd cases. Finally, we make a few brief remarks about how this distribution would be affected if the Higgs boson turns out to not be a CP-eigenstate.

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48 pages

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  • Journal Name: Phys.Rev.D74:073001,2006; Journal Volume: 74

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  • Report No.: FERMILAB-PUB-06-160-T
  • Grant Number: AC02-07CH11359
  • DOI: 10.1103/PhysRevD.74.073001 | External Link
  • Office of Scientific & Technical Information Report Number: 897286
  • Archival Resource Key: ark:/67531/metadc887762

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  • June 1, 2006

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  • Sept. 22, 2016, 2:13 a.m.

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  • Dec. 2, 2016, 6:02 p.m.

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Mahlon, Gregory; /Penn State U., Mont Alto; Parke, Stephen J. & /Fermilab. Using Spin Correlations to Distinguish Zh from ZA at the International Linear Collider, article, June 1, 2006; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc887762/: accessed September 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.