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)1. Such an exotic state of strongly interacting quantum chro- modynamics matter is produced in the laboratory in heavy nuclei high-energy collisions, where an enhanced production of strange hadrons is observed2–6. Strangeness enhancement, originally proposed as a signature of QGP formation in nuc- lear collisions7 , is more pronounced for multi-strange baryons. Several effects typical of heavy-ion phenomenology have been observed in high-multiplicity proton–proton (pp) collisions8,9 , 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 signifi- cantly with the event charged-particle multiplicity. The mea- surements are in remarkable agreement with the p–Pb colli- sion results10,11, 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.
Eser Adı (dc.title) | Enhanced production of multi-strange hadrons in high-multiplicity proton–proton collisions |
Yayın Türü (dc.type) | Makale |
Yazar/lar (dc.contributor.author) | KARASU UYSAL, Ayben |
Yazar/lar (dc.contributor.author) | ALICE Collaboration |
DOI Numarası (dc.identifier.doi) | http://dx.doi.org/10.1038/nphys4111 |
Atıf Dizini (dc.source.database) | Wos |
Atıf Dizini (dc.source.database) | Scopus |
Konu Başlıkları (dc.subject) | Multi-Strange Hadrons |
Konu Başlıkları (dc.subject) | LHC |
Konu Başlıkları (dc.subject) | ALICE |
Yayın Tarihi (dc.date.issued) | 2017 |
Kayıt Giriş Tarihi (dc.date.accessioned) | 2019-07-08T08:00:57Z |
Açık Erişim tarihi (dc.date.available) | 2019-07-08T08:00:57Z |
Orcid (dc.identifier.orcid) | 0000-0001-6297-2532 |
Özet (dc.description.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)1. Such an exotic state of strongly interacting quantum chro- modynamics matter is produced in the laboratory in heavy nuclei high-energy collisions, where an enhanced production of strange hadrons is observed2–6. Strangeness enhancement, originally proposed as a signature of QGP formation in nuc- lear collisions7 , is more pronounced for multi-strange baryons. Several effects typical of heavy-ion phenomenology have been observed in high-multiplicity proton–proton (pp) collisions8,9 , 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 signifi- cantly with the event charged-particle multiplicity. The mea- surements are in remarkable agreement with the p–Pb colli- sion results10,11, 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. |
Tek Biçim Adres (dc.identifier.uri) | https://hdl.handle.net/20.500.12498/609 |