Measuring KS0K± interactions using pp collisions at √s = 7 TeV
S. Acharya,F.T.-. Acosta, D. Adamová, A. Adler,J. Adolfsson,M.M. Aggarwal,G. Aglieri Rinella,M. Agnello,N. Agrawal, Z. Ahammed,S.U. Ahn,S. Aiola,A. Akindinov,M. Al-Turany,S.N. Alam, D.S.D. Albuquerque,D. Aleksandrov, B. Alessandro, H.M. Alfanda,R. Alfaro Molina,Y. Ali, A. Alici, A. Alkin,J. Alme, T. Alt,L. Altenkamper, I. Altsybeev, M.N. Anaam,C. Andrei,D. Andreou,H.A. Andrews, A. Andronic,M. Angeletti, V. Anguelov,C. Anson, T. Antičić, F. Antinori,P. Antonioli, R. Anwar,N. Apadula,L. Aphecetche, H. Appelshäuser, S. Arcelli,R. Arnaldi, M. Arratia, I.C. Arsene, M. Arslandok,A. Augustinus, R. Averbeck, M.D. Azmi,A. Badalà,Y.W. Baek, S. Bagnasco, R. Bailhache,R. Bala, A. Baldisseri,M. Ball,R.C. Baral, A.M. Barbano, R. Barbera,F. Barile,L. Barioglio, G.G. Barnaföldi, L.S. Barnby, V. Barret,P. Bartalini,K. Barth,E. Bartsch, N. Bastid,S. Basu,G. Batigne,B. Batyunya, P.C. Batzing,J.L. Bazo Alba,I.G. Bearden,H. Beck,C. Bedda, N.K. Behera, I. Belikov,F. Bellini,H. Bello Martinez,R. 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PHYSICS LETTERS B（2019）
引用 21|浏览107
摘要
We present the first measurements of femtoscopic correlations between the K-S(0) and K-+/- particles in pp collisions at root s = 7 TeV measured by the ALICE experiment. The observed femtoscopic correlations are consistent with final-state interactions proceeding solely via the a(0)(980) resonance. The extracted kaon source radius and correlation strength parameters for (KSK-)-K-0 are found to be equal within the experimental uncertainties to those for (KSK+)-K-0. Results of the present study are compared with those from identical-kaon femtoscopic studies also performed with pp collisions at root s = 7 TeV by ALICE and with a (KSK +/-)-K-0 measurement in Pb-Pb collisions at root s(NN) = 2.76 TeV. Combined with the Pb-Pb results, our pp analysis is found to be compatible with the interpretation of the a (980) having a tetraquark structure instead of that of a diquark. (C) 2018 Published by Elsevier B.V.
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