Monte Carlo results on the Collins asymmetries in $e^+e^-$ annihilation - INSPIRE

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Monte Carlo results on the Collins asymmetries in $e^+e^-$ annihilation

Oct 15, 2024

8 pages

Published in:

PoS Transversity2024 (2024) 007

Contribution to:

- Transversity 2024
, 007
,
- Transversity 2024

Published: Dec 4, 2024

e-Print:

2410.11489 [hep-ph]

DOI:

10.22323/1.477.0007

View in:

ADS Abstract Service

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Abstract: (SISSA)

The quark spin effects have been introduced in the Pythia 8 Monte Carlo event generator for the simulation of

e^+e^-

annihilation by interfacing the generator with the StringSpinner package. The package allows to simulate quark spin effects in the string fragmentation routine of Pythia by using the string+

{}^3P_0

model, recently applied to the fragmentation of a string stretched between a quark-antiquark pair with correlated spin states.StringSpinner is used to carry out simulations of

e^+e^-

annihilation at the center of mass energy of

10.6\,\rm{GeV}

. The Collins asymmetries are extracted from the simulated data for back-to-back pion pairs using both the thrust axis method and the hadronic plane method. The results are compared with the data from the BELLE and BABAR experiments, finding a satisfactory agreement.

Note:

8 pages, 4 figures, Proceedings of 7th International Workshop on Transverse phenomena in hard processes and the transverse structure of the proton (Transversity2024). arXiv admin note: substantial text overlap with arXiv:2312.17034

References(19)

Figures(7)

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