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K_{S}^{0} and Λ Production in Pb-Pb Collisions at sqrt[s_{NN}]=2.76 TeV.

Abelev, B; Adam, J; Adamová, D; Adare, A M; Aggarwal, M M; Aglieri Rinella, G; Agnello, M; Agocs, A G; Agostinelli, A and Ahammed, Z, et al. (2013) In Physical Review Letters 111(22).
Abstract
The ALICE measurement of K_{S}^{0} and Λ production at midrapidity in Pb-Pb collisions at sqrt[s_{NN}]=2.76 TeV is presented. The transverse momentum (p_{T}) spectra are shown for several collision centrality intervals and in the p_{T} range from 0.4 GeV/c (0.6 GeV/c for Λ) to 12 GeV/c. The p_{T} dependence of the Λ/K_{S}^{0} ratios exhibits maxima in the vicinity of 3 GeV/c, and the positions of the maxima shift towards higher p_{T} with increasing collision centrality. The magnitude of these maxima increases by almost a factor of three between most peripheral and most central Pb-Pb collisions. This baryon excess at intermediate p_{T} is not observed in pp interactions at sqrt[s]=0.9 TeV and at sqrt[s]=7 TeV. Qualitatively, the baryon... (More)
The ALICE measurement of K_{S}^{0} and Λ production at midrapidity in Pb-Pb collisions at sqrt[s_{NN}]=2.76 TeV is presented. The transverse momentum (p_{T}) spectra are shown for several collision centrality intervals and in the p_{T} range from 0.4 GeV/c (0.6 GeV/c for Λ) to 12 GeV/c. The p_{T} dependence of the Λ/K_{S}^{0} ratios exhibits maxima in the vicinity of 3 GeV/c, and the positions of the maxima shift towards higher p_{T} with increasing collision centrality. The magnitude of these maxima increases by almost a factor of three between most peripheral and most central Pb-Pb collisions. This baryon excess at intermediate p_{T} is not observed in pp interactions at sqrt[s]=0.9 TeV and at sqrt[s]=7 TeV. Qualitatively, the baryon enhancement in heavy-ion collisions is expected from radial flow. However, the measured p_{T} spectra above 2 GeV/c progressively decouple from hydrodynamical-model calculations. For higher values of p_{T}, models that incorporate the influence of the medium on the fragmentation and hadronization processes describe qualitatively the p_{T} dependence of the Λ/K_{S}^{0} ratio. (Less)
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Physical Review Letters
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111
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22
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American Physical Society
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  • pmid:24329443
  • scopus:84888606232
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1079-7114
DOI
10.1103/PhysRevLett.111.222301
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English
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014bcf89-dd6b-46af-b1f8-64d0c58063f7 (old id 4223905)
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@article{014bcf89-dd6b-46af-b1f8-64d0c58063f7,
  abstract     = {The ALICE measurement of K_{S}^{0} and Λ production at midrapidity in Pb-Pb collisions at sqrt[s_{NN}]=2.76 TeV is presented. The transverse momentum (p_{T}) spectra are shown for several collision centrality intervals and in the p_{T} range from 0.4 GeV/c (0.6 GeV/c for Λ) to 12 GeV/c. The p_{T} dependence of the Λ/K_{S}^{0} ratios exhibits maxima in the vicinity of 3 GeV/c, and the positions of the maxima shift towards higher p_{T} with increasing collision centrality. The magnitude of these maxima increases by almost a factor of three between most peripheral and most central Pb-Pb collisions. This baryon excess at intermediate p_{T} is not observed in pp interactions at sqrt[s]=0.9 TeV and at sqrt[s]=7 TeV. Qualitatively, the baryon enhancement in heavy-ion collisions is expected from radial flow. However, the measured p_{T} spectra above 2 GeV/c progressively decouple from hydrodynamical-model calculations. For higher values of p_{T}, models that incorporate the influence of the medium on the fragmentation and hadronization processes describe qualitatively the p_{T} dependence of the Λ/K_{S}^{0} ratio.},
  articleno    = {222301},
  author       = {Abelev, B and Adam, J and Adamová, D and Adare, A M and Aggarwal, M M and Aglieri Rinella, G and Agnello, M and Agocs, A G and Agostinelli, A and Ahammed, Z and Ahmad, N and Ahmad Masoodi, A and Ahmed, I and Ahn, S U and Ahn, S A and Aimo, I and Aiola, S and Ajaz, M and Akindinov, A and Aleksandrov, D and Alessandro, B and Alexandre, D and Alici, A and Alkin, A and Alme, J and Alt, T and Altini, V and Altinpinar, S and Altsybeev, I and Alves Garcia Prado, C and Andrei, C and Andronic, A and Anguelov, V and Anielski, J and Antičić, T and Antinori, F and Antonioli, P and Aphecetche, L and Appelshäuser, H and Arbor, N and Arcelli, S and Armesto, N and Arnaldi, R and Aronsson, T and Arsene, I C and Arslandok, M and Augustinus, A and Averbeck, R and Awes, T C and Azmi, M D and Bach, M and Badalà, A and Baek, Y W and Bailhache, R and Bairathi, V and Bala, R and Baldisseri, A and Baltasar Dos Santos Pedrosa, F and Bán, J and Baral, R C and Barbera, R and Barile, F and 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A and Tapia Takaki, J D and Tarantola Peloni, A and Tarazona Martinez, A and Tauro, A and Tejeda Muñoz, G and Telesca, A and Terrevoli, C and Ter Minasyan, A and Thäder, J and Thomas, D and Tieulent, R and Timmins, A R and Toia, A and Torii, H and Trubnikov, V and Trzaska, W H and Tsuji, T and Tumkin, A and Turrisi, R and Tveter, T S and Ulery, J and Ullaland, K and Ulrich, J and Uras, A and Urciuoli, G M and Usai, G L and Vajzer, M and Vala, M and Valencia Palomo, L and Vande Vyvre, P and Vannucci, L and Van Hoorne, J W and van Leeuwen, M and Vargas, A and Varma, R and Vasileiou, M and Vasiliev, A and Vechernin, V and Veldhoen, M and Venaruzzo, M and Vercellin, E and Vergara, S and Vernet, R and Verweij, M and Vickovic, L and Viesti, G and Viinikainen, J and Vilakazi, Z and Villalobos Baillie, O and Vinogradov, A and Vinogradov, L and Vinogradov, Y and Virgili, T and Viyogi, Y P and Vodopyanov, A and Völkl, M A and Voloshin, S and Voloshin, K and Volpe, G and von Haller, B and Vorobyev, I and Vranic, D and Vrláková, J and Vulpescu, B and Vyushin, A and Wagner, B and Wagner, V and Wagner, J and Wang, Y and Wang, Y and Wang, M and Watanabe, D and Watanabe, K and Weber, M and Wessels, J P and Westerhoff, U and Wiechula, J and Wikne, J and Wilde, M and Wilk, G and Wilkinson, J and Williams, M C S and Windelband, B and Winn, M and Xiang, C and Yaldo, C G and Yamaguchi, Y and Yang, H and Yang, P and Yang, S and Yano, S and Yasnopolskiy, S and Yi, J and Yin, Z and Yoo, I-K and Yushmanov, I and Zaccolo, V and Zach, C and Zampolli, C and Zaporozhets, S and Zarochentsev, A and Závada, P and Zaviyalov, N and Zbroszczyk, H and Zelnicek, P and Zgura, I S and Zhalov, M and Zhang, F and Zhang, Y and Zhang, H and Zhang, X and Zhou, D and Zhou, Y and Zhou, F and Zhu, X and Zhu, J and Zhu, J and Zhu, H and Zichichi, A and Zimmermann, M B and Zimmermann, A and Zinovjev, G and Zoccarato, Y and Zynovyev, M and Zyzak, M},
  issn         = {1079-7114},
  language     = {eng},
  number       = {22},
  publisher    = {American Physical Society},
  series       = {Physical Review Letters},
  title        = {K_{S}^{0} and Λ Production in Pb-Pb Collisions at sqrt[s_{NN}]=2.76 TeV.},
  url          = {http://dx.doi.org/10.1103/PhysRevLett.111.222301},
  volume       = {111},
  year         = {2013},
}