Enhanced production of multi-strange hadrons in high-multiplicity proton-proton collisions

J. Adam; D. Adamova; MM. Aggarwal; G.A. Rinella; Maria Agnello; N. Agrawal; Z. Ahmmed; Shamim Ahmad; S. U. Ahn; S. Aiola; A. Akindinov; SN Alam; DSD Albuquerque; D. Aleksandrov; B. Alessandro; Rafael A. Molina; A. Alici; A. Alkin; 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; Hans Bøggild

doi:10.1038/NPHYS4111

Enhanced production of multi-strange hadrons in high-multiplicity proton-proton collisions

J. Adam, D. Adamova, MM. Aggarwal, G.A. Rinella, Maria Agnello, N. Agrawal, Z. Ahmmed, Shamim Ahmad, S. U. Ahn, S. Aiola, A. Akindinov, SN Alam, DSD Albuquerque, D. Aleksandrov, B. Alessandro, Rafael A. Molina, A. Alici, A. Alkin, 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, Hans Bøggild

Eksperimentel subatomar fysik

230 Citationer (Scopus)

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Abstract

At sufficiently high temperature and energy density, nuclear matter undergoes a transition to a phase in which quarks and gluons are not confined: the quark-gluon plasma (QGP). Such an exotic state of strongly interacting quantum chromodynamics matter is produced in the laboratory in heavy nuclei high-energy collisions, where an enhanced production of strange hadrons is observed. Strangeness enhancement, originally proposed as a signature of QGP formation in nuclear collisions, is more pronounced for multi-strange baryons. Several effects typical of heavy-ion phenomenology have been observed in high-multiplicity proton-proton (pp) collisions, but the enhanced production of multi-strange particles has not been reported so far. Here we present the first observation of strangeness enhancement in high-multiplicity proton-proton collisions. We find that the integrated yields of strange and multi-strange particles, relative to pions, increases significantly with the event charged-particle multiplicity. The measurements are in remarkable agreement with the p-Pb collision results, indicating that the phenomenon is related to the final system created in the collision. In high-multiplicity events strangeness production reaches values similar to those observed in Pb-Pb collisions, where a QGP is formed.

Originalsprog	Engelsk
Tidsskrift	Nature Physics
Vol/bind	13
Udgave nummer	3
Sider (fra-til)	535-539
ISSN	1745-2473
DOI	https://doi.org/10.1038/NPHYS4111
Status	Udgivet - 2 jun. 2017

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10.1038/NPHYS4111

nphys4111Forlagets udgivne version, 652 KBLicens: CC BY

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Adam, J., Adamova, D., Aggarwal, MM., Rinella, G. A., Agnello, M., Agrawal, N., Ahmmed, Z., Ahmad, S., U. Ahn, S., Aiola, S., Akindinov, A., Alam, SN., Albuquerque, DSD., Aleksandrov, D., Alessandro, B., Molina, R. A., Alici, A., Alkin, A., Bearden, I., ... Bøggild, H. (2017). Enhanced production of multi-strange hadrons in high-multiplicity proton-proton collisions. Nature Physics, 13(3), 535-539. https://doi.org/10.1038/NPHYS4111

Adam, J, Adamova, D, Aggarwal, MM, Rinella, GA, Agnello, M, Agrawal, N, Ahmmed, Z, Ahmad, S, U. Ahn, S, Aiola, S, Akindinov, A, Alam, SN, Albuquerque, DSD, Aleksandrov, D, Alessandro, B, Molina, RA, Alici, A, Alkin, A, 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 & Bøggild, H 2017, 'Enhanced production of multi-strange hadrons in high-multiplicity proton-proton collisions', Nature Physics, bind 13, nr. 3, s. 535-539. https://doi.org/10.1038/NPHYS4111

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title = "Enhanced production of multi-strange hadrons in high-multiplicity proton-proton collisions",

abstract = "At sufficiently high temperature and energy density, nuclear matter undergoes a transition to a phase in which quarks and gluons are not confined: the quark-gluon plasma (QGP). Such an exotic state of strongly interacting quantum chromodynamics matter is produced in the laboratory in heavy nuclei high-energy collisions, where an enhanced production of strange hadrons is observed. Strangeness enhancement, originally proposed as a signature of QGP formation in nuclear collisions, is more pronounced for multi-strange baryons. Several effects typical of heavy-ion phenomenology have been observed in high-multiplicity proton-proton (pp) collisions, but the enhanced production of multi-strange particles has not been reported so far. Here we present the first observation of strangeness enhancement in high-multiplicity proton-proton collisions. We find that the integrated yields of strange and multi-strange particles, relative to pions, increases significantly with the event charged-particle multiplicity. The measurements are in remarkable agreement with the p-Pb collision results, indicating that the phenomenon is related to the final system created in the collision. In high-multiplicity events strangeness production reaches values similar to those observed in Pb-Pb collisions, where a QGP is formed.",

author = "J. Adam and D. Adamova and MM. Aggarwal and G.A. Rinella and Maria Agnello and N. Agrawal and Z. Ahmmed and Shamim Ahmad and {U. Ahn}, S. and S. Aiola and A. Akindinov and SN Alam and DSD Albuquerque and D. Aleksandrov and B. Alessandro and Molina, {Rafael A.} and A. Alici and A. Alkin 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 and Hans B{\o}ggild",

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T1 - Enhanced production of multi-strange hadrons in high-multiplicity proton-proton collisions

AU - Adam, J.

AU - Adamova, D.

AU - Aggarwal, MM.

AU - Rinella, G.A.

AU - Agnello, Maria

AU - Agrawal, N.

AU - Ahmmed, Z.

AU - Ahmad, Shamim

AU - U. Ahn, S.

AU - Aiola, S.

AU - Akindinov, A.

AU - Alam, SN

AU - Albuquerque, DSD

AU - Aleksandrov, D.

AU - Alessandro, B.

AU - Molina, Rafael A.

AU - Alici, A.

AU - Alkin, A.

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

AU - Bøggild, Hans

PY - 2017/6/2

Y1 - 2017/6/2

N2 - At sufficiently high temperature and energy density, nuclear matter undergoes a transition to a phase in which quarks and gluons are not confined: the quark-gluon plasma (QGP). Such an exotic state of strongly interacting quantum chromodynamics matter is produced in the laboratory in heavy nuclei high-energy collisions, where an enhanced production of strange hadrons is observed. Strangeness enhancement, originally proposed as a signature of QGP formation in nuclear collisions, is more pronounced for multi-strange baryons. Several effects typical of heavy-ion phenomenology have been observed in high-multiplicity proton-proton (pp) collisions, but the enhanced production of multi-strange particles has not been reported so far. Here we present the first observation of strangeness enhancement in high-multiplicity proton-proton collisions. We find that the integrated yields of strange and multi-strange particles, relative to pions, increases significantly with the event charged-particle multiplicity. The measurements are in remarkable agreement with the p-Pb collision results, indicating that the phenomenon is related to the final system created in the collision. In high-multiplicity events strangeness production reaches values similar to those observed in Pb-Pb collisions, where a QGP is formed.

AB - At sufficiently high temperature and energy density, nuclear matter undergoes a transition to a phase in which quarks and gluons are not confined: the quark-gluon plasma (QGP). Such an exotic state of strongly interacting quantum chromodynamics matter is produced in the laboratory in heavy nuclei high-energy collisions, where an enhanced production of strange hadrons is observed. Strangeness enhancement, originally proposed as a signature of QGP formation in nuclear collisions, is more pronounced for multi-strange baryons. Several effects typical of heavy-ion phenomenology have been observed in high-multiplicity proton-proton (pp) collisions, but the enhanced production of multi-strange particles has not been reported so far. Here we present the first observation of strangeness enhancement in high-multiplicity proton-proton collisions. We find that the integrated yields of strange and multi-strange particles, relative to pions, increases significantly with the event charged-particle multiplicity. The measurements are in remarkable agreement with the p-Pb collision results, indicating that the phenomenon is related to the final system created in the collision. In high-multiplicity events strangeness production reaches values similar to those observed in Pb-Pb collisions, where a QGP is formed.

U2 - 10.1038/NPHYS4111

DO - 10.1038/NPHYS4111

M3 - Journal article

SN - 1745-2473

VL - 13

SP - 535

EP - 539

JO - Nature Physics

JF - Nature Physics

IS - 3

ER -

Enhanced production of multi-strange hadrons in high-multiplicity proton-proton collisions

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