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Published December 1, 2015 | Published + Submitted + Supplemental Material
Journal Article Open

Collins asymmetries in inclusive charged KK and Kπ pairs produced in e^+e^− annihilation


We present measurements of Collins asymmetries in the inclusive process e^+e^− → h_1h_2X, h_1h_2 = KK, Kπ, ππ, at the center-of-mass energy of 10.6 GeV, using a data sample of 468  fb^(−1) collected by the BABAR experiment at the PEP-II B factory at SLAC National Accelerator Center. Considering hadrons in opposite thrust hemispheres of hadronic events, we observe clear azimuthal asymmetries in the ratio of unlike sign to like sign, and unlike sign to all charged h_1h_2 pairs, which increase with hadron energies. The Kπ asymmetries are similar to those measured for the ππ pairs, whereas those measured for high-energy KK pairs are, in general, larger.

Additional Information

© 2015 American Physical Society. Received 23 June 2015; published 22 December 2015. We are grateful for the excellent luminosity and machine conditions provided by our PEP-II2 colleagues, and for the substantial dedicated effort from the computing organizations that support BABAR. The collaborating institutions wish to thank SLAC for its support and kind hospitality. This work is supported by DOE and NSF (U.S.), NSERC (Canada), CEA and CNRS-IN2P3 (France), BMBF and DFG (Germany), INFN (Italy), FOM (The Netherlands), NFR (Norway), MES (Russia), MEC (Spain), and STFC (U.K.). Individuals have received support from the Marie Curie EIF (European Union) and the A. P. Sloan Foundation.

Attached Files

Submitted - 1506.05864v1.pdf

Published - PhysRevD.92.111101.pdf

Supplemental Material - SuppMat.pdf


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August 20, 2023
August 20, 2023