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Title: Spin and chirality effects in antler-topology processes at high energy $${e^+e^-}$$ colliders

Abstract

We perform a model-independent investigation of spin and chirality correlation effects in the antler-topology processes e +e -→P +P -→(ℓ+D0)(ℓ-D¯0) at high-energy e +e - colliders with polarized beams. Generally the production process e +e -→P +P - can occur not only through the s-channel exchange of vector bosons, V0 , including the neutral Standard Model (SM) gauge bosons, γ and Z, but also through the s- and t-channel exchanges of new neutral states, S0 and T0 , and the u-channel exchange of new doubly charged states, U-- . The general set of (non-chiral) three-point couplings of the new particles and leptons allowed in a renormalizable quantum field theory is considered. The general spin and chirality analysis is based on the threshold behavior of the excitation curves for P +P - pair production in e +e - collisions with longitudinal- and transverse-polarized beams, the angular distributions in the production process and also the production-decay angular correlations. In the first step, we present the observables in the helicity formalism. Subsequently, we show how a set of observables can be designed for determining the spins and chiral structures of the new particles without any model assumptions. Finally, taking into account a typicalmore » set of approximately chiral invariant scenarios, we demonstrate how the spin and chirality effects can be probed experimentally at a high-energy e +e - collider.« less

Authors:
 [1];  [2];  [3];  [3]
  1. Chonbuk National Univ., Jeonbuk (Korea, Republic of); Univ. of Pittsburgh, PA (United States)
  2. Illinois State Univ., Normal, IL (United States)
  3. Univ. of Pittsburgh, PA (United States)
Publication Date:
Research Org.:
Univ. of Wisconsin, Madison, WI (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1503040
Alternate Identifier(s):
OSTI ID: 1438012
Grant/Contract Number:  
fg02-95er40896
Resource Type:
Journal Article: Published Article
Journal Name:
European Physical Journal. C, Particles and Fields
Additional Journal Information:
Journal Volume: 75; Journal Issue: 10; Journal ID: ISSN 1434-6044
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Choi, S. Y., Christensen, N. D., Salmon, D., and Wang, X. Spin and chirality effects in antler-topology processes at high energy $${e^+e^-}$$ colliders. United States: N. p., 2015. Web. doi:10.1140/epjc/s10052-015-3682-4.
Choi, S. Y., Christensen, N. D., Salmon, D., & Wang, X. Spin and chirality effects in antler-topology processes at high energy $${e^+e^-}$$ colliders. United States. doi:10.1140/epjc/s10052-015-3682-4.
Choi, S. Y., Christensen, N. D., Salmon, D., and Wang, X. Thu . "Spin and chirality effects in antler-topology processes at high energy $${e^+e^-}$$ colliders". United States. doi:10.1140/epjc/s10052-015-3682-4.
@article{osti_1503040,
title = {Spin and chirality effects in antler-topology processes at high energy $${e^+e^-}$$ colliders},
author = {Choi, S. Y. and Christensen, N. D. and Salmon, D. and Wang, X.},
abstractNote = {We perform a model-independent investigation of spin and chirality correlation effects in the antler-topology processes e+e-→P+P-→(ℓ+D0)(ℓ-D¯0) at high-energy e+e- colliders with polarized beams. Generally the production process e+e-→P+P- can occur not only through the s-channel exchange of vector bosons, V0 , including the neutral Standard Model (SM) gauge bosons, γ and Z, but also through the s- and t-channel exchanges of new neutral states, S0 and T0 , and the u-channel exchange of new doubly charged states, U-- . The general set of (non-chiral) three-point couplings of the new particles and leptons allowed in a renormalizable quantum field theory is considered. The general spin and chirality analysis is based on the threshold behavior of the excitation curves for P+P- pair production in e+e- collisions with longitudinal- and transverse-polarized beams, the angular distributions in the production process and also the production-decay angular correlations. In the first step, we present the observables in the helicity formalism. Subsequently, we show how a set of observables can be designed for determining the spins and chiral structures of the new particles without any model assumptions. Finally, taking into account a typical set of approximately chiral invariant scenarios, we demonstrate how the spin and chirality effects can be probed experimentally at a high-energy e+e- collider.},
doi = {10.1140/epjc/s10052-015-3682-4},
journal = {European Physical Journal. C, Particles and Fields},
issn = {1434-6044},
number = 10,
volume = 75,
place = {United States},
year = {2015},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1140/epjc/s10052-015-3682-4

Figures / Tables:

Fig. 1 Fig. 1 : The correlated process e+e → $P$+$P$ → ( $\ell$+$D$0)( $\ell$0) characterized by the antler-topology diagram. Here, the invisible finalstate particle $D$0 might be charge self-conjugate, i.e. ($D$0)$c$ = $D$0

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