A novel beam-spin asymmetry in double-hadron inclusive lepto-production

M. Anselmino; V. Barone; A. Kotzinian

doi:10.1016/j.physletb.2012.06.003

A novel beam-spin asymmetry in double-hadron inclusive lepto-production

M. Anselmino
, V. Barone
, A. Kotzinian

Dipartimento di Scienze e Innovazione Tecnologica

Risultato della ricerca: Contributo su rivista › Articolo in rivista › peer review

Abstract

We show that a new beam-spin asymmetry appears in deep inelastic inclusive lepto-production at low transverse momenta when a hadron in the target fragmentation region is observed in association with another hadron in the current fragmentation region. The beam leptons are longitudinally polarized while the target nucleons are unpolarized. This asymmetry is a leading-twist effect generated by the correlation between the transverse momentum of quarks and the transverse momentum of the hadron emitted by the target. Experimental signatures of this effect are discussed.

Lingua originale	Inglese
pagine (da-a)	317-320
Numero di pagine	4
Rivista	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	713
Numero di pubblicazione	3
DOI	https://doi.org/10.1016/j.physletb.2012.06.003
Stato di pubblicazione	Pubblicato - 9 lug 2012

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10.1016/j.physletb.2012.06.003

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title = "A novel beam-spin asymmetry in double-hadron inclusive lepto-production",

abstract = "We show that a new beam-spin asymmetry appears in deep inelastic inclusive lepto-production at low transverse momenta when a hadron in the target fragmentation region is observed in association with another hadron in the current fragmentation region. The beam leptons are longitudinally polarized while the target nucleons are unpolarized. This asymmetry is a leading-twist effect generated by the correlation between the transverse momentum of quarks and the transverse momentum of the hadron emitted by the target. Experimental signatures of this effect are discussed.",

keywords = "Fracture functions, Polarization, Semi-inclusive DIS, Target fragmentation, Transverse momentum",

author = "M. Anselmino and V. Barone and A. Kotzinian",

note = "Funding Information: We are very grateful to John Collins for useful discussion and suggestions. We acknowledge support by the European Community – Research Infrastructure Activity under the FP6 Program “Structuring the European Research Area” (HadronPhysics, contract number RII3-CT-2004-506078 ), by the Italian Ministry of Education, University and Research ( PRIN 2008 ) and by the Helmholtz Association through funds provided to the virtual institute “Spin and Strong QCD” ( VH-VI-231 ). The work of one of us (A.K.) is also supported by Regione Piemonte .",

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doi = "10.1016/j.physletb.2012.06.003",

language = "English",

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T1 - A novel beam-spin asymmetry in double-hadron inclusive lepto-production

AU - Anselmino, M.

AU - Barone, V.

AU - Kotzinian, A.

N1 - Funding Information: We are very grateful to John Collins for useful discussion and suggestions. We acknowledge support by the European Community – Research Infrastructure Activity under the FP6 Program “Structuring the European Research Area” (HadronPhysics, contract number RII3-CT-2004-506078 ), by the Italian Ministry of Education, University and Research ( PRIN 2008 ) and by the Helmholtz Association through funds provided to the virtual institute “Spin and Strong QCD” ( VH-VI-231 ). The work of one of us (A.K.) is also supported by Regione Piemonte .

PY - 2012/7/9

Y1 - 2012/7/9

N2 - We show that a new beam-spin asymmetry appears in deep inelastic inclusive lepto-production at low transverse momenta when a hadron in the target fragmentation region is observed in association with another hadron in the current fragmentation region. The beam leptons are longitudinally polarized while the target nucleons are unpolarized. This asymmetry is a leading-twist effect generated by the correlation between the transverse momentum of quarks and the transverse momentum of the hadron emitted by the target. Experimental signatures of this effect are discussed.

AB - We show that a new beam-spin asymmetry appears in deep inelastic inclusive lepto-production at low transverse momenta when a hadron in the target fragmentation region is observed in association with another hadron in the current fragmentation region. The beam leptons are longitudinally polarized while the target nucleons are unpolarized. This asymmetry is a leading-twist effect generated by the correlation between the transverse momentum of quarks and the transverse momentum of the hadron emitted by the target. Experimental signatures of this effect are discussed.

KW - Fracture functions

KW - Polarization

KW - Semi-inclusive DIS

KW - Target fragmentation

KW - Transverse momentum

UR - https://www.scopus.com/pages/publications/84862652538

U2 - 10.1016/j.physletb.2012.06.003

DO - 10.1016/j.physletb.2012.06.003

M3 - Article

SN - 0370-2693

VL - 713

SP - 317

EP - 320

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 3

ER -

A novel beam-spin asymmetry in double-hadron inclusive lepto-production

Abstract

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