Measurements of charmed-meson production in interactions between 350 GeV/c pi(-) particles and nuclei

被引：74

作者：

Adamovich, M

Alexandrov, Y

Angelini, C

Barberis, D

Batten, JC

Ceradini, F

Cianfarani, C

Dameri, M

Darbo, G

Duane, A

Flaminio, V

Forino, A

French, BR

Frenkel, A

Gemme, C

Harrison, K

Hurst, R

Kirk, A

Lazzeroni, C

Malferrari, L

Martellotti, G

Martinengo, P

Mazzanti, P

McEwen, JG

Nechaeva, P

Osculati, B

Passaseo, M

Penso, G

Quareni, A

Rossi, L

Verzocchi, M

Websdale, DM

Zanello, L

Zavertyaev, M

机构：

[1] IST NAZL FIS NUCL, I-56010 PISA, ITALY

[2] UNIV PISA, I-56010 PISA, ITALY

[3] UNIV GENOA, I-16146 GENOA, ITALY

[4] IST NAZL FIS NUCL, I-16146 GENOA, ITALY

[5] UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED, LONDON SW7 2BZ, ENGLAND

[6] UNIV ROME ROME TRE, I-00146 ROME, ITALY

[7] IST NAZL FIS NUCL, I-00146 ROME, ITALY

[8] CERN, CH-1211 GENEVA 23, SWITZERLAND

[9] UNIV ROMA LA SAPIENZA, I-00185 ROME, ITALY

[10] IST NAZL FIS NUCL, I-00185 ROME, ITALY

[11] UNIV SOUTHAMPTON, SOUTHAMPTON SO17 1BJ, HANTS, ENGLAND

来源：

NUCLEAR PHYSICS B | 1997年 / 495卷 / 1-2期

关键词：

charmed-meson hadroproduction; cross-section measurements; nuclear-mass dependence of cross sections; chi F and p tau(2) distributions; particle-antiparticle asymmetries;

D O I：

10.1016/S0550-3213(97)00223-X

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

Charmed-meson production by 350 GeV/c pi(-) particles incident on copper and tungsten targets has been studied in the WA92 experiment, performed at the CERN Omega' spectrometer. Results obtained are reported and discussed. Reconstruction of decays from the set D-0 --> K- pi(+), D-0 --> K(-)pi(-)pi(+)pi(+), D+ --> K(-)pi(+)pi(+), D-s(+) --> phi pi(+) and charge conjugates has yielded a sample of 7280 +/- 108 charmed mesons, produced with chi(F) > 0, (chi(F)) = 0.18 and [p(T)(2)] = 1.86 (GeV/c)(2). Assuming a relationship sigma = sigma(0)A(alpha) between the cross section, sigma, per nucleus of mass A and the nucleonic cross section, sigma(0), the alpha value found for the detected charmed particles is 0.95 +/- 0.06 +/- 0.03. Taking alpha = 1, the measured cross sections per nucleon for chi(F) > 0 production are 7.78 +/- 0.14 +/- 0.52 mu b for D-0/(D) over bar(0), 3.28 +/- 0.08 +/- 0.29 mu b for D+/D- and 1.29 +/- 0.16 +/- 0.33 mu b for D-s(+)/D-s(-). Differential cross sections with respect to chi(F) and p tau(2) have been determined for the various types of charmed meson, and particle-antiparticle asymmetries have been analysed. (C) 1997 Elsevier Science B.V.

引用

页码：3 / 34

页数：32

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