Central Pb+Pb collisions at 158 A GeV/c studied by π−π− interferometry

M M Aggarwal; A Agnihotri; Z Ahammed; A L S Angelis; V Antonenko; V Arefiev; V Astakhov; V Avdeitchikov; T C Awes; PVKS Baba; SK Badyal; C Barlag; S Bathe; B Batiounia; T Bernier; KB Bhalla; VS Bhatia; C Blume; R Bock; EM Bohne; Z Borocz; D Bucher; A Buijs; H Busching; L Carlen; V Chalyshev; S Chattopadhyay; R Cherbatchev; T Chujo; A Claussen; AC Das; MP Decowski; H Delagrange; V Djordjadze; P Donni; I Doubovik; S Dutt; MRD Majumdar; K El Chenawi; S Eliseev; K Enosawa; P Foka; S Fokin; MS Ganti; S Garpman; O Gavrishchuk; FJM Geurts; TK Ghosh; R Glasow; H. Löhner; WA98 Collaboration

doi:10.1007/s100520000413

Central Pb+Pb collisions at 158 A GeV/c studied by π−π− interferometry

M M Aggarwal^*, A Agnihotri, Z Ahammed, A L S Angelis, V Antonenko, V Arefiev, V Astakhov, V Avdeitchikov, T C Awes, PVKS Baba, SK Badyal, C Barlag, S Bathe, B Batiounia, T Bernier, KB Bhalla, VS Bhatia, C Blume, R Bock, EM BohneZ Borocz, D Bucher, A Buijs, H Busching, L Carlen, V Chalyshev, S Chattopadhyay, R Cherbatchev, T Chujo, A Claussen, AC Das, MP Decowski, H Delagrange, V Djordjadze, P Donni, I Doubovik, S Dutt, MRD Majumdar, K El Chenawi, S Eliseev, K Enosawa, P Foka, S Fokin, MS Ganti, S Garpman, O Gavrishchuk, FJM Geurts, TK Ghosh, R Glasow, H. Löhner, WA98 Collaboration

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

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Abstract

Two-particle correlations have been measured for identified pi(-) from central 158 A GeV Pb+Pb collisions and fitted radii of about 7 fm in all dimensions have been obtained. A multi-dimensional study of the radii as a function of k(gamma) is presented, including a full correction for the resolution effects of the apparatus. The cross term R-out-long(2) of the standard fit in the Longitudinally CoMoving System (LCMS) and the upsilon(L) parameter of the generalised Yano-Koonin fit are compatible with 0, suggesting that the source undergoes a boost invariant expansion.

The shapes of the correlation functions in Q(inv) and Q(space) = root have been analyzed in detail. They are not Gaussian but better represented by exponentials. As a consequence, fitting Gaussians to these correlation functions may produce different radii depending on the acceptance of the experimental setup used for the measurement.

Original language	English
Pages (from-to)	445-451
Number of pages	7
Journal	The European Physical Journal C
Volume	16
Issue number	3
DOIs	https://doi.org/10.1007/s100520000413
Publication status	Published - Sept-2000

Keywords

HEAVY-ION COLLISIONS
MULTISTEP AVALANCHE CHAMBERS
PB+PB COLLISIONS
PION INTERFEROMETRY
2-PION CORRELATIONS
PERFORMANCE
TRACKING
READOUT
SYSTEMS

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Central Pb+Pb collisions
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Aggarwal, M. M., Agnihotri, A., Ahammed, Z., Angelis, A. L. S., Antonenko, V., Arefiev, V., Astakhov, V., Avdeitchikov, V., Awes, T. C., Baba, PVKS., Badyal, SK., Barlag, C., Bathe, S., Batiounia, B., Bernier, T., Bhalla, KB., Bhatia, VS., Blume, C., Bock, R., ... WA98 Collaboration (2000). Central Pb+Pb collisions at 158 A GeV/c studied by π−π− interferometry. The European Physical Journal C, 16(3), 445-451. https://doi.org/10.1007/s100520000413

@article{62c3fb1fe0eb4941b8cc1a107c3fa30d,

title = "Central Pb+Pb collisions at 158 A GeV/c studied by π−π− interferometry",

abstract = "Two-particle correlations have been measured for identified pi(-) from central 158 A GeV Pb+Pb collisions and fitted radii of about 7 fm in all dimensions have been obtained. A multi-dimensional study of the radii as a function of k(gamma) is presented, including a full correction for the resolution effects of the apparatus. The cross term R-out-long(2) of the standard fit in the Longitudinally CoMoving System (LCMS) and the upsilon(L) parameter of the generalised Yano-Koonin fit are compatible with 0, suggesting that the source undergoes a boost invariant expansion.The shapes of the correlation functions in Q(inv) and Q(space) = root have been analyzed in detail. They are not Gaussian but better represented by exponentials. As a consequence, fitting Gaussians to these correlation functions may produce different radii depending on the acceptance of the experimental setup used for the measurement.",

keywords = "HEAVY-ION COLLISIONS, MULTISTEP AVALANCHE CHAMBERS, PB+PB COLLISIONS, PION INTERFEROMETRY, 2-PION CORRELATIONS, PERFORMANCE, TRACKING, READOUT, SYSTEMS",

author = "Aggarwal, {M M} and A Agnihotri and Z Ahammed and Angelis, {A L S} and V Antonenko and V Arefiev and V Astakhov and V Avdeitchikov and Awes, {T C} and PVKS Baba and SK Badyal and C Barlag and S Bathe and B Batiounia and T Bernier and KB Bhalla and VS Bhatia and C Blume and R Bock and EM Bohne and Z Borocz and D Bucher and A Buijs and H Busching and L Carlen and V Chalyshev and S Chattopadhyay and R Cherbatchev and T Chujo and A Claussen and AC Das and MP Decowski and H Delagrange and V Djordjadze and P Donni and I Doubovik and S Dutt and MRD Majumdar and {El Chenawi}, K and S Eliseev and K Enosawa and P Foka and S Fokin and MS Ganti and S Garpman and O Gavrishchuk and FJM Geurts and TK Ghosh and R Glasow and H. L{\"o}hner and {WA98 Collaboration}",

year = "2000",

month = sep,

doi = "10.1007/s100520000413",

language = "English",

volume = "16",

pages = "445--451",

journal = "The European Physical Journal C",

issn = "1434-6044",

publisher = "Springer",

number = "3",

}

Aggarwal, MM, Agnihotri, A, Ahammed, Z, Angelis, ALS, Antonenko, V, Arefiev, V, Astakhov, V, Avdeitchikov, V, Awes, TC, Baba, PVKS, Badyal, SK, Barlag, C, Bathe, S, Batiounia, B, Bernier, T, Bhalla, KB, Bhatia, VS, Blume, C, Bock, R, Bohne, EM, Borocz, Z, Bucher, D, Buijs, A, Busching, H, Carlen, L, Chalyshev, V, Chattopadhyay, S, Cherbatchev, R, Chujo, T, Claussen, A, Das, AC, Decowski, MP, Delagrange, H, Djordjadze, V, Donni, P, Doubovik, I, Dutt, S, Majumdar, MRD, El Chenawi, K, Eliseev, S, Enosawa, K, Foka, P, Fokin, S, Ganti, MS, Garpman, S, Gavrishchuk, O, Geurts, FJM, Ghosh, TK, Glasow, R, Löhner, H & WA98 Collaboration 2000, 'Central Pb+Pb collisions at 158 A GeV/c studied by π−π− interferometry', The European Physical Journal C, vol. 16, no. 3, pp. 445-451. https://doi.org/10.1007/s100520000413

TY - JOUR

T1 - Central Pb+Pb collisions at 158 A GeV/c studied by π−π− interferometry

AU - Aggarwal, M M

AU - Agnihotri, A

AU - Ahammed, Z

AU - Angelis, A L S

AU - Antonenko, V

AU - Arefiev, V

AU - Astakhov, V

AU - Avdeitchikov, V

AU - Awes, T C

AU - Baba, PVKS

AU - Badyal, SK

AU - Barlag, C

AU - Bathe, S

AU - Batiounia, B

AU - Bernier, T

AU - Bhalla, KB

AU - Bhatia, VS

AU - Blume, C

AU - Bock, R

AU - Bohne, EM

AU - Borocz, Z

AU - Bucher, D

AU - Buijs, A

AU - Busching, H

AU - Carlen, L

AU - Chalyshev, V

AU - Chattopadhyay, S

AU - Cherbatchev, R

AU - Chujo, T

AU - Claussen, A

AU - Das, AC

AU - Decowski, MP

AU - Delagrange, H

AU - Djordjadze, V

AU - Donni, P

AU - Doubovik, I

AU - Dutt, S

AU - Majumdar, MRD

AU - El Chenawi, K

AU - Eliseev, S

AU - Enosawa, K

AU - Foka, P

AU - Fokin, S

AU - Ganti, MS

AU - Garpman, S

AU - Gavrishchuk, O

AU - Geurts, FJM

AU - Ghosh, TK

AU - Glasow, R

AU - Löhner, H.

AU - WA98 Collaboration

PY - 2000/9

Y1 - 2000/9

N2 - Two-particle correlations have been measured for identified pi(-) from central 158 A GeV Pb+Pb collisions and fitted radii of about 7 fm in all dimensions have been obtained. A multi-dimensional study of the radii as a function of k(gamma) is presented, including a full correction for the resolution effects of the apparatus. The cross term R-out-long(2) of the standard fit in the Longitudinally CoMoving System (LCMS) and the upsilon(L) parameter of the generalised Yano-Koonin fit are compatible with 0, suggesting that the source undergoes a boost invariant expansion.The shapes of the correlation functions in Q(inv) and Q(space) = root have been analyzed in detail. They are not Gaussian but better represented by exponentials. As a consequence, fitting Gaussians to these correlation functions may produce different radii depending on the acceptance of the experimental setup used for the measurement.

AB - Two-particle correlations have been measured for identified pi(-) from central 158 A GeV Pb+Pb collisions and fitted radii of about 7 fm in all dimensions have been obtained. A multi-dimensional study of the radii as a function of k(gamma) is presented, including a full correction for the resolution effects of the apparatus. The cross term R-out-long(2) of the standard fit in the Longitudinally CoMoving System (LCMS) and the upsilon(L) parameter of the generalised Yano-Koonin fit are compatible with 0, suggesting that the source undergoes a boost invariant expansion.The shapes of the correlation functions in Q(inv) and Q(space) = root have been analyzed in detail. They are not Gaussian but better represented by exponentials. As a consequence, fitting Gaussians to these correlation functions may produce different radii depending on the acceptance of the experimental setup used for the measurement.

KW - HEAVY-ION COLLISIONS

KW - MULTISTEP AVALANCHE CHAMBERS

KW - PB+PB COLLISIONS

KW - PION INTERFEROMETRY

KW - 2-PION CORRELATIONS

KW - PERFORMANCE

KW - TRACKING

KW - READOUT

KW - SYSTEMS

U2 - 10.1007/s100520000413

DO - 10.1007/s100520000413

M3 - Article

SN - 1434-6044

VL - 16

SP - 445

EP - 451

JO - The European Physical Journal C

JF - The European Physical Journal C

IS - 3

ER -

Central Pb+Pb collisions at 158 A GeV/c studied by π−π− interferometry

Abstract

Keywords

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