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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/131196
Measurement of Collins asymmetries in inclusive production of charged pion pairs in e+e- annihilation at BABAR
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We present measurements of Collins asymmetries in the inclusive process e + e − → π π X , where π stands for charged pions, at a center-of-mass energy of 10.6 GeV. We use a data sample of 468 fb − 1 collected by the BABAR experiment at the PEP-II B factory at SLAC, and consider pairs of charged pions produced in opposite hemispheres of hadronic events. We observe clear asymmetries in the distributions of the azimuthal angles in two distinct reference frames. We study the dependence of the asymmetry on several kinematic variables, finding that it increases with increasing pion momentum and momentum transverse to the analysis axis, and with increasing angle between the thrust and beam axis.
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GRAUGÉS POUS, Eugeni and BABAR Collaboration. Measurement of Collins asymmetries in inclusive production of charged pion pairs in e+e- annihilation at BABAR. Physical Review D. 2014. Vol. 90, num. 5, pags. 052003. ISSN 1550-7998. [consulted: 12 of August of 2026]. Available at: https://hdl.handle.net/2445/131196