Interplay among transversity induced asymmetries in hadron leptoproduction - INSPIRE

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Interplay among transversity induced asymmetries in hadron leptoproduction

COMPASS

Collaboration

•

C. Adolph
(
- Erlangen - Nuremberg U.
)

Jul 27, 2015

6 pages

Published in:

Phys.Lett.B 753 (2016) 406-411

Published: Feb 10, 2016

e-Print:

1507.07593 [hep-ex]

DOI:

10.1016/j.physletb.2015.12.042

Report number:

CERN-PH-EP-2015-199

Experiments:

CERN-SPS-NA58

View in:

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Citations per year

Abstract: (Elsevier)

In the fragmentation of a transversely polarized quark several left–right asymmetries are possible for the hadrons in the jet. When only one unpolarized hadron is selected, it exhibits an azimuthal modulation known as the Collins effect. When a pair of oppositely charged hadrons is observed, three asymmetries can be considered, a di-hadron asymmetry and two single hadron asymmetries. In lepton deep inelastic scattering on transversely polarized nucleons all these asymmetries are coupled with the transversity distribution. From the high statistics COMPASS data on oppositely charged hadron-pair production we have investigated for the first time the dependence of these three asymmetries on the difference of the azimuthal angles of the two hadrons. The similarity of transversity induced single and di-hadron asymmetries is discussed. A new analysis of the data allows quantitative relationships to be established among them, providing for the first time strong experimental indication that the underlying fragmentation mechanisms are all driven by a common physical process.

Note:

6 figures

hadron: asymmetry
asymmetry: left-right
hadron: leptoproduction
effect: Collins
transversity
fragmentation
hadron hadron
deep inelastic scattering
angular dependence
semi-inclusive reaction

References(29)

Figures(5)

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