Fragmentation of transversely polarized quarks probed in transverse momentum distributions

John Collins

doi:10.1016/0550-3213(93)90262-N

Fragmentation of transversely polarized quarks probed in transverse momentum distributions

John Collins

Physics

Research output: Contribution to journal › Article › peer-review

1032 Scopus citations

Abstract

It is shown that the azimuthal dependence of the distribution of hadrons in a quark jet is a probe of the transverse spin of the quark initiating the jet. This results in a new spin-dependent fragmentation function that acts at the twist-2 level. One example of a process where it contributes is semi-inclusive deeply inelastic scattering with a transversely polarized nucleon target but with an unpolarized electron beam. This process is treated in detail. Another process in the cross section for singly polarized hadron-hadron scattering when two high-p_⊥ hadrons are measured in the final state and are close to back-to-back in azimuth. The new fragmentation function is sensitive to the coupling of the fragmentation process to (spontaneous) chiral symmetry breaking.

Original language	English (US)
Pages (from-to)	161-182
Number of pages	22
Journal	Nuclear Physics, Section B
Volume	396
Issue number	1
DOIs	https://doi.org/10.1016/0550-3213(93)90262-N
State	Published - May 10 1993

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

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10.1016/0550-3213(93)90262-N

Cite this

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title = "Fragmentation of transversely polarized quarks probed in transverse momentum distributions",

abstract = "It is shown that the azimuthal dependence of the distribution of hadrons in a quark jet is a probe of the transverse spin of the quark initiating the jet. This results in a new spin-dependent fragmentation function that acts at the twist-2 level. One example of a process where it contributes is semi-inclusive deeply inelastic scattering with a transversely polarized nucleon target but with an unpolarized electron beam. This process is treated in detail. Another process in the cross section for singly polarized hadron-hadron scattering when two high-p ⊥ hadrons are measured in the final state and are close to back-to-back in azimuth. The new fragmentation function is sensitive to the coupling of the fragmentation process to (spontaneous) chiral symmetry breaking.",

author = "John Collins",

note = "Funding Information: I would like to thank several colleagues for useful conversations, in particular Bob Carlitz, Steve Heppelmann, Bob Jaffe, Glenn Ladinsky, Lech Mankiewicz, Jian-Wei Qiu and George Sterman. This work was supported in part by the US Department of Energy under grant DE-FGO2-9OER-40577 and by the Texas National Laboratory Research Commission.",

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doi = "10.1016/0550-3213(93)90262-N",

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pages = "161--182",

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T1 - Fragmentation of transversely polarized quarks probed in transverse momentum distributions

AU - Collins, John

N1 - Funding Information: I would like to thank several colleagues for useful conversations, in particular Bob Carlitz, Steve Heppelmann, Bob Jaffe, Glenn Ladinsky, Lech Mankiewicz, Jian-Wei Qiu and George Sterman. This work was supported in part by the US Department of Energy under grant DE-FGO2-9OER-40577 and by the Texas National Laboratory Research Commission.

PY - 1993/5/10

Y1 - 1993/5/10

N2 - It is shown that the azimuthal dependence of the distribution of hadrons in a quark jet is a probe of the transverse spin of the quark initiating the jet. This results in a new spin-dependent fragmentation function that acts at the twist-2 level. One example of a process where it contributes is semi-inclusive deeply inelastic scattering with a transversely polarized nucleon target but with an unpolarized electron beam. This process is treated in detail. Another process in the cross section for singly polarized hadron-hadron scattering when two high-p ⊥ hadrons are measured in the final state and are close to back-to-back in azimuth. The new fragmentation function is sensitive to the coupling of the fragmentation process to (spontaneous) chiral symmetry breaking.

AB - It is shown that the azimuthal dependence of the distribution of hadrons in a quark jet is a probe of the transverse spin of the quark initiating the jet. This results in a new spin-dependent fragmentation function that acts at the twist-2 level. One example of a process where it contributes is semi-inclusive deeply inelastic scattering with a transversely polarized nucleon target but with an unpolarized electron beam. This process is treated in detail. Another process in the cross section for singly polarized hadron-hadron scattering when two high-p ⊥ hadrons are measured in the final state and are close to back-to-back in azimuth. The new fragmentation function is sensitive to the coupling of the fragmentation process to (spontaneous) chiral symmetry breaking.

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DO - 10.1016/0550-3213(93)90262-N

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VL - 396

SP - 161

EP - 182

JO - Nuclear Physics B

JF - Nuclear Physics B

SN - 0550-3213

IS - 1

ER -

Fragmentation of transversely polarized quarks probed in transverse momentum distributions

Abstract

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