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Published February 23, 2009 | public
Journal Article

Determining spin through quantum azimuthal-angle correlations

Abstract

Determining the spin of new particles is critical in identifying the true theory among various extensions of the Standard Model at the next generation of colliders. Quantum interference between different helicity amplitudes was shown to be effective when the final state is fully reconstructible. However, many interesting new physics processes allow only for partial reconstruction. In this Letter, we show how the interference effect can be unambiguously extracted even in processes that have two-fold ambiguity, by considering the correlation between two decay planes in e^+e^− collisions.

Additional Information

© 2009 Elsevier. Received 24 November 2008; received in revised form 16 January 2009; accepted 19 January 2009; available online 21 January 2009. K.M. acknowledges the hospitality of the Chonbuk National University where part of this work was carried out. The work of S.Y.C. was supported in part by the Korea Research Foundation Grant funded by the Korean Government (MOERHRD, Basic Research Promotion Fund) (KRF-2007-521-C00065) and in part by KOSEF through CHEP at Kyungpook National University. The work of M.R.B. and H.M. was supported in part by World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan, in part by the US DOE under Contract DE-AC03-76SF00098, and in part by the NSF under grant PHY-04-57315.

Additional details

Created:
August 20, 2023
Modified:
October 18, 2023