First measurements of hyperon time-like form factors at large Q 2 and evidence of diquark correlations

Sean Dobbs; A. Tomaradze; T. Xiao; Kamal K. Seth

doi:10.1063/1.4949456

First measurements of hyperon time-like form factors at large Q ² and evidence of diquark correlations

Sean Dobbs^*, A. Tomaradze, T. Xiao, Kamal K. Seth

^*Corresponding author for this work

Physics and Astronomy

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

2 Scopus citations

Abstract

Using e⁺e^- annihilation data taken with the CLEO-c detector at s = 3770 MeV and 4170 MeV, we report the first measurements of the electromagnetic form factors of the Λ⁰, Σ⁰, Σ⁺, Ξ⁰, Ξ^-, and Ω^- hyperons for the large timelike momentum transfers of |Q²| = 14.2 GeV² and 17.4 GeV², respectively. The enhancement in Λ⁰ production over that of Σ⁰, both of which have the same uds quark content, gives evidence for significant diquark correlations in these hyperons. Improved measurements of the branching fractions of ψ(2S) to hyperon-antihyperon pairs are also reported.

Original language	English (US)
Title of host publication	XVIth International Conference on Hadron Spectroscopy, Hadron 2015
Editors	Michael R. Pennington
Publisher	American Institute of Physics Inc.
ISBN (Electronic)	9780735413894
DOIs	https://doi.org/10.1063/1.4949456
State	Published - May 25 2016
Event	16th International Conference on Hadron Spectroscopy, Hadron 2015 - Newport News, United States Duration: Sep 13 2015 → Sep 18 2015

Publication series

Name	AIP Conference Proceedings
Volume	1735
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Other

Other	16th International Conference on Hadron Spectroscopy, Hadron 2015
Country/Territory	United States
City	Newport News
Period	9/13/15 → 9/18/15

ASJC Scopus subject areas

General Physics and Astronomy

Access to Document

10.1063/1.4949456

Cite this

Dobbs, S., Tomaradze, A., Xiao, T., & Seth, K. K. (2016). First measurements of hyperon time-like form factors at large Q ² and evidence of diquark correlations. In M. R. Pennington (Ed.), XVIth International Conference on Hadron Spectroscopy, Hadron 2015 Article 80003 (AIP Conference Proceedings; Vol. 1735). American Institute of Physics Inc.. https://doi.org/10.1063/1.4949456

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title = "First measurements of hyperon time-like form factors at large Q 2 and evidence of diquark correlations",

abstract = "Using e+e- annihilation data taken with the CLEO-c detector at s = 3770 MeV and 4170 MeV, we report the first measurements of the electromagnetic form factors of the Λ0, Σ0, Σ+, Ξ0, Ξ-, and Ω- hyperons for the large timelike momentum transfers of |Q2| = 14.2 GeV2 and 17.4 GeV2, respectively. The enhancement in Λ0 production over that of Σ0, both of which have the same uds quark content, gives evidence for significant diquark correlations in these hyperons. Improved measurements of the branching fractions of ψ(2S) to hyperon-antihyperon pairs are also reported.",

author = "Sean Dobbs and A. Tomaradze and T. Xiao and Seth, {Kamal K.}",

note = "Publisher Copyright: {\textcopyright} 2016 Author(s).; 16th International Conference on Hadron Spectroscopy, Hadron 2015 ; Conference date: 13-09-2015 Through 18-09-2015",

year = "2016",

month = may,

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doi = "10.1063/1.4949456",

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Dobbs, S, Tomaradze, A, Xiao, T & Seth, KK 2016, First measurements of hyperon time-like form factors at large Q ² and evidence of diquark correlations. in MR Pennington (ed.), XVIth International Conference on Hadron Spectroscopy, Hadron 2015., 80003, AIP Conference Proceedings, vol. 1735, American Institute of Physics Inc., 16th International Conference on Hadron Spectroscopy, Hadron 2015, Newport News, United States, 9/13/15. https://doi.org/10.1063/1.4949456

First measurements of hyperon time-like form factors at large Q ² and evidence of diquark correlations. / Dobbs, Sean; Tomaradze, A.; Xiao, T. et al.
XVIth International Conference on Hadron Spectroscopy, Hadron 2015. ed. / Michael R. Pennington. American Institute of Physics Inc., 2016. 80003 (AIP Conference Proceedings; Vol. 1735).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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AU - Dobbs, Sean

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N2 - Using e+e- annihilation data taken with the CLEO-c detector at s = 3770 MeV and 4170 MeV, we report the first measurements of the electromagnetic form factors of the Λ0, Σ0, Σ+, Ξ0, Ξ-, and Ω- hyperons for the large timelike momentum transfers of |Q2| = 14.2 GeV2 and 17.4 GeV2, respectively. The enhancement in Λ0 production over that of Σ0, both of which have the same uds quark content, gives evidence for significant diquark correlations in these hyperons. Improved measurements of the branching fractions of ψ(2S) to hyperon-antihyperon pairs are also reported.

AB - Using e+e- annihilation data taken with the CLEO-c detector at s = 3770 MeV and 4170 MeV, we report the first measurements of the electromagnetic form factors of the Λ0, Σ0, Σ+, Ξ0, Ξ-, and Ω- hyperons for the large timelike momentum transfers of |Q2| = 14.2 GeV2 and 17.4 GeV2, respectively. The enhancement in Λ0 production over that of Σ0, both of which have the same uds quark content, gives evidence for significant diquark correlations in these hyperons. Improved measurements of the branching fractions of ψ(2S) to hyperon-antihyperon pairs are also reported.

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