Measuring (KSK +/-)-K-0 interactions using Pb-Pb collisions at root S-NN=2.76 TeV

S. Acharya; D. Adamova; J Adolfsson; MM. Aggarwal; G.A. Rinella; Maria Agnello; N. Agrawal; Z. Ahammed; N Ahmad; S. U. Ahn; S. Aiola; A. Akindinov; SN Alam; J.L.B. Alba; DSD Albuquerque; D. Aleksandrov; B. Alessandro; R. Alfaro Molina; Ian Bearden; Christian Holm Christensen; Kristjan Herlache Gulbrandsen; Jens Jørgen Gaardhøje; Børge Svane Nielsen; Ante Bilandzic; Marek Chojnacki; Valentina Zaccolo; You Zhou; Christian Alexander Bourjau; Lais Ozelin de Lima Pimentel; Katarina Gajdosova; Vojtech Pacik

doi:10.1016/j.physletb.2017.09.009

Measuring (KSK +/-)-K-0 interactions using Pb-Pb collisions at root S-NN=2.76 TeV

S. Acharya, D. Adamova, J Adolfsson, MM. Aggarwal, G.A. Rinella, Maria Agnello, N. Agrawal, Z. Ahammed, N Ahmad, S. U. Ahn, S. Aiola, A. Akindinov, SN Alam, J.L.B. Alba, DSD Albuquerque, D. Aleksandrov, B. Alessandro, R. Alfaro Molina, Ian Bearden, Christian Holm ChristensenKristjan Herlache Gulbrandsen, Jens Jørgen Gaardhøje, Børge Svane Nielsen, Ante Bilandzic, Marek Chojnacki, Valentina Zaccolo, You Zhou, Christian Alexander Bourjau, Lais Ozelin de Lima Pimentel, Katarina Gajdosova, Vojtech Pacik

Experimental Particle Physics

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Abstract

We present the first ever measurements of femtoscopic correlations between the K_S ⁰ and K^± particles. The analysis was performed on the data from Pb–Pb collisions at s_NN=2.76 TeV measured by the ALICE experiment. The observed femtoscopic correlations are consistent with final-state interactions proceeding via the a₀(980) resonance. The extracted kaon source radius and correlation strength parameters for K_S ⁰K⁻ are found to be equal within the experimental uncertainties to those for K_S ⁰K⁺. Comparing the results of the present study with those from published identical-kaon femtoscopic studies by ALICE, mass and coupling parameters for the a₀ resonance are tested. Our results are also compatible with the interpretation of the a₀ having a tetraquark structure instead of that of a diquark.

Original language	English
Journal	Physics Letters B
Volume	774
Pages (from-to)	64-77
ISSN	0370-2693
DOIs	https://doi.org/10.1016/j.physletb.2017.09.009
Publication status	Published - 10 Nov 2017

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Acharya, S., Adamova, D., Adolfsson, J., Aggarwal, MM., Rinella, G. A., Agnello, M., Agrawal, N., Ahammed, Z., Ahmad, N., U. Ahn, S., Aiola, S., Akindinov, A., Alam, SN., Alba, J. L. B., Albuquerque, DSD., Aleksandrov, D., Alessandro, B., Alfaro Molina, R., Bearden, I., ... Pacik, V. (2017). Measuring (KSK +/-)-K-0 interactions using Pb-Pb collisions at root S-NN=2.76 TeV. Physics Letters B, 774, 64-77. https://doi.org/10.1016/j.physletb.2017.09.009

Acharya, S, Adamova, D, Adolfsson, J, Aggarwal, MM, Rinella, GA, Agnello, M, Agrawal, N, Ahammed, Z, Ahmad, N, U. Ahn, S, Aiola, S, Akindinov, A, Alam, SN, Alba, JLB, Albuquerque, DSD, Aleksandrov, D, Alessandro, B, Alfaro Molina, R, Bearden, I , Christensen, CH , Gulbrandsen, KH , Gaardhøje, JJ , Nielsen, BS, Bilandzic, A, Chojnacki, M, Zaccolo, V, Zhou, Y, Bourjau, CA, Pimentel, LODL, Gajdosova, K & Pacik, V 2017, 'Measuring (KSK +/-)-K-0 interactions using Pb-Pb collisions at root S-NN=2.76 TeV', Physics Letters B, vol. 774, pp. 64-77. https://doi.org/10.1016/j.physletb.2017.09.009

@article{522aaa169c9f4c7ea1489f770bb55087,

title = "Measuring (KSK +/-)-K-0 interactions using Pb-Pb collisions at root S-NN=2.76 TeV",

abstract = "We present the first ever measurements of femtoscopic correlations between the KS 0 and K± particles. The analysis was performed on the data from Pb–Pb collisions at sNN=2.76 TeV measured by the ALICE experiment. The observed femtoscopic correlations are consistent with final-state interactions proceeding via the a0(980) resonance. The extracted kaon source radius and correlation strength parameters for KS 0K− are found to be equal within the experimental uncertainties to those for KS 0K+. Comparing the results of the present study with those from published identical-kaon femtoscopic studies by ALICE, mass and coupling parameters for the a0 resonance are tested. Our results are also compatible with the interpretation of the a0 having a tetraquark structure instead of that of a diquark.",

author = "S. Acharya and D. Adamova and J Adolfsson and MM. Aggarwal and G.A. Rinella and Maria Agnello and N. Agrawal and Z. Ahammed and N Ahmad and {U. Ahn}, S. and S. Aiola and A. Akindinov and SN Alam and J.L.B. Alba and DSD Albuquerque and D. Aleksandrov and B. Alessandro and {Alfaro Molina}, R. and Ian Bearden and Christensen, {Christian Holm} and Gulbrandsen, {Kristjan Herlache} and Gaardh{\o}je, {Jens J{\o}rgen} and Nielsen, {B{\o}rge Svane} and Ante Bilandzic and Marek Chojnacki and Valentina Zaccolo and You Zhou and Bourjau, {Christian Alexander} and Pimentel, {Lais Ozelin de Lima} and Katarina Gajdosova and Vojtech Pacik",

year = "2017",

month = nov,

day = "10",

doi = "10.1016/j.physletb.2017.09.009",

language = "English",

volume = "774",

pages = "64--77",

journal = "Physics Letters B: Particle Physics, Nuclear Physics and Cosmology",

issn = "0370-2693",

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TY - JOUR

T1 - Measuring (KSK +/-)-K-0 interactions using Pb-Pb collisions at root S-NN=2.76 TeV

AU - Acharya, S.

AU - Adamova, D.

AU - Adolfsson, J

AU - Aggarwal, MM.

AU - Rinella, G.A.

AU - Agnello, Maria

AU - Agrawal, N.

AU - Ahammed, Z.

AU - Ahmad, N

AU - U. Ahn, S.

AU - Aiola, S.

AU - Akindinov, A.

AU - Alam, SN

AU - Alba, J.L.B.

AU - Albuquerque, DSD

AU - Aleksandrov, D.

AU - Alessandro, B.

AU - Alfaro Molina, R.

AU - Bearden, Ian

AU - Christensen, Christian Holm

AU - Gulbrandsen, Kristjan Herlache

AU - Gaardhøje, Jens Jørgen

AU - Nielsen, Børge Svane

AU - Bilandzic, Ante

AU - Chojnacki, Marek

AU - Zaccolo, Valentina

AU - Zhou, You

AU - Bourjau, Christian Alexander

AU - Pimentel, Lais Ozelin de Lima

AU - Gajdosova, Katarina

AU - Pacik, Vojtech

PY - 2017/11/10

Y1 - 2017/11/10

N2 - We present the first ever measurements of femtoscopic correlations between the KS 0 and K± particles. The analysis was performed on the data from Pb–Pb collisions at sNN=2.76 TeV measured by the ALICE experiment. The observed femtoscopic correlations are consistent with final-state interactions proceeding via the a0(980) resonance. The extracted kaon source radius and correlation strength parameters for KS 0K− are found to be equal within the experimental uncertainties to those for KS 0K+. Comparing the results of the present study with those from published identical-kaon femtoscopic studies by ALICE, mass and coupling parameters for the a0 resonance are tested. Our results are also compatible with the interpretation of the a0 having a tetraquark structure instead of that of a diquark.

AB - We present the first ever measurements of femtoscopic correlations between the KS 0 and K± particles. The analysis was performed on the data from Pb–Pb collisions at sNN=2.76 TeV measured by the ALICE experiment. The observed femtoscopic correlations are consistent with final-state interactions proceeding via the a0(980) resonance. The extracted kaon source radius and correlation strength parameters for KS 0K− are found to be equal within the experimental uncertainties to those for KS 0K+. Comparing the results of the present study with those from published identical-kaon femtoscopic studies by ALICE, mass and coupling parameters for the a0 resonance are tested. Our results are also compatible with the interpretation of the a0 having a tetraquark structure instead of that of a diquark.

U2 - 10.1016/j.physletb.2017.09.009

DO - 10.1016/j.physletb.2017.09.009

M3 - Journal article

SN - 0370-2693

VL - 774

SP - 64

EP - 77

JO - Physics Letters B: Particle Physics, Nuclear Physics and Cosmology

JF - Physics Letters B: Particle Physics, Nuclear Physics and Cosmology

ER -

Measuring (KSK +/-)-K-0 interactions using Pb-Pb collisions at root S-NN=2.76 TeV

Abstract

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