Bose-Einstein Correlations of Charged Kaons and Pions in Central Pb+Pb Collisions at 158 AGeV PDF Download
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Author: In-Kwon Yoo
Publisher:
ISBN: 9783897034631
Category :
Languages : en
Pages : 89
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Author: In-Kwon Yoo
Publisher:
ISBN: 9783897034631
Category :
Languages : en
Pages : 89
Get Book Here
Book Description
Author: S. Afanasʹev
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ISBN:
Category :
Languages : en
Pages : 0
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Author: Kenneth Aamodt
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ISBN:
Category :
Languages : en
Pages : 0
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The first measurement of two-pion Bose-Einstein correlations in central Pb-Pb collisions at √sNN=2.76 TeV at the Large Hadron Collider is presented. We observe a growing trend with energy now not only for the longitudinal and the outward but also for the sideward pion source radius. The pion homogeneity volume and the decoupling time are significantly larger than those measured at RHIC.
Author: Matúš Kaliský
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ISBN:
Category :
Languages : en
Pages : 0
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Author: Ivanna Juricic
Publisher:
ISBN:
Category :
Languages : en
Pages : 348
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Author:
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Category :
Languages : en
Pages :
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Author: S. Afanasʹev
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ISBN:
Category :
Languages : en
Pages : 0
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Author:
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Category :
Languages : en
Pages :
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Author:
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Category :
Languages : en
Pages :
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The MARK II detector is used to study the Bose-Einstein correlation between pairs and triplets of charged pions produced in hadronic decays of the J)psi), the .sqrt.s = 4 to 7 GeV continuum above the J)psi), two photon events at .sqrt.s = 29 GeV, and e/sup)plus/)e/sup)minus/) annihilation events at .sqrt.s = 29 GeV as a function of Q2, the four-momentum transfer squared. After corrections for Coulomb effects and pion misidentification, we find a nearly full Bose-Einstein enhancement .cap alpha. in the J)psi) and the two photon data and about half the maximum value in the other two data sets. The radius parameter)tau)(an average over space and time) given by pion pair analyses lies within a band of +-0.10 fm around 0.73 fm and is the same, within errors, for all four data sets. Pion triplet analyses also give a consistent radius of approx. 0.54 fm. fits to two-dimensional distributions R(q/sub T/2, q/sub C/2) of invariant components of Q2 = q/sub T/2)plus) q/sub C/2 give)tau)/sub T/ approx.)tau)C approx.)tau), where q/sub T/ is the transverse three-momentum difference calculated with respect to the net pair three-momentum, and q/sub C/ is in effect the longitudinal three-momentum difference in the pion pair rest frame. When q/sub T/ is calculated with respect to the jet axis for two-jet events in the e/sup)plus/)e/sup)minus/) annihilation data at .sqrt.s = 29 GeV, a fit to R(q/sub T/2, q/sub C/2) also gives)tau)/sub T/ approx.)tau)/sub C/ approx.)tau). Noting that q/sub L/ and q0 are not invariant, we make fits to R(/sub T//sup T/, q/sub L/2) and to R(q/sub T/2, q02) (Kopylov formulation), and we find)tau)0 approx.)tau)/sub L/ approx.)23))tau)/sub T/ to)12))tau)/sub T/. 44 refs., 43 figs., 15 tabs.
Author: R. Bock
Publisher:
ISBN:
Category :
Languages : fr
Pages : 11
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