Measuring K0SK± interactions using pp collisions at √s=7 TeV
Acharya, Shreyasi; Acosta, Fernando Torales; Adamová, Dagmar; Adler, Clemens; Adolfsson, Jonatan; Aggarwal, Madan M.; Aglieri Rinella, Gianluca; Agnello, Michelangelo; Agrawal, Nikita; Ahammed, Zubayer; Alme, Johan; Altenkaemper, Lucas; Djuvsland, Øystein; Ersdal, Magnus Rentsch; Fionda, Fiorella Maria Celeste; Nystrand, Joakim; Rehman, Attiq ur; Røhrich, Dieter; Tambave, Ganesh Jagannath; Ullaland, Kjetil; Wagner, Boris; Yuan, Shiming; Zhou, Zhuo; Arsene, Ionut Cristian; Bätzing, Paul Christoph; Dordic, Olja; Lardeux, Antoine Xavier; Lindal, Svein; Mahmood, Sohail Musa; Malik, Qasim Waheed; Richter, Matthias; Røed, Ketil; Skaali, Toralf Bernhard; Tveter, Trine Spedstad; Wikne, Jon Christopher; Zhao, Chengxin; Helstrup, Håvard; Hetland, Kristin Fanebust; Kileng, Bjarte; Nesbø, Simon Voigt; Storetvedt, Maksim Melnik; Langøy, Rune; Lien, Jørgen André; Ahn, Sang Un; Aiola, Salvatore; Akindinov, Alexander; Alam, Sk Noor; De Albuquerque, Danilo Silva; Aleksandrov, Dimitry; Alessandro, Bruno; ALICE, Collaboration
Journal article, Peer reviewed
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http://hdl.handle.net/11250/2607595Utgivelsesdato
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Originalversjon
Acharya, S., Acosta, F. T., Adamová, D., Adler, A., Adolfsson, J., Aggarwal, M. M., . . . Zmeskal, J. (2019). Measuring KS0K± interactions using pp collisions at √s=7 TeV. Physics Letters B, 790, 22-34. 10.1016/j.physletb.2018.12.033Sammendrag
We present the first measurements of femtoscopic correlations between the K0S and K± particles in pp collisions at √s = 7 TeV measured by the ALICE experiment. The observed femtoscopic correlationsare consistent with final-state interactions proceeding solely via the a0(980) resonance. The extractedkaon source radius and correlation strength parameters for K0SK− are found to be equal within theexperimental uncertainties to those for K0SK+. Results of the present study are compared with thosefrom identical-kaon femtoscopic studies also performed with pp collisions at √s = 7 TeV by ALICE andwith a K0SK± measurement in Pb–Pb collisions at √sNN = 2.76 TeV. Combined with the Pb–Pb results, ourpp analysis is found to be compatible with the interpretation of the a0(980) having a tetraquark structureinstead of that of a diquark.