Precision measurement of the Ξ0 mass and the branching ratios of the decays Ξ0 → Λγ and Ξ0 → Σ0γ

被引：1
|
作者：
Fanti, V [1 ]
Lai, A
Marras, D
Musa, L
Nappi, A
Hay, B
Moore, KN
Moore, RW
Munday, DJ
Needham, MD
Parker, MA
White, TO
Wotton, SA
Barr, G
Blumer, H
Bocquet, G
Bremer, J
Ceccucci, A
Cogan, J
Cundy, D
Doble, N
Fischer, G
Funk, W
Gatignon, L
Gianoli, A
Gonidec, A
Govi, G
Grafström, P
Lacourt, A
Luitz, S
Marzulli, V
Matheys, JP
Norton, A
Palestini, S
Panzer-Steindel, B
Schinzel, D
Taureg, H
Velasco, M
Vossnack, O
Wahl, H
Wirrer, G
Gaponenko, A
Kekelidze, V
Madigojine, D
Mestvirishvili, A
Molokanova, N
Potrebenikov, Y
Tatishvili, G
Tkatchev, A
Zinchenko, A
机构：
[1] Univ Cagliari, Dipartimento Fis, I-09100 Cagliari, Italy
[2] Ist Nazl Fis Nucl, Sez Cagliari, I-09100 Cagliari, Italy
[3] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England
[4] CERN, CH-1211 Geneva 23, Switzerland
[5] Joint Inst Nucl Res, Dubna, Russia
[6] Univ Edinburgh, Dept Phys & Astron, Edinburgh EH9 3JZ, Midlothian, Scotland
[7] Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy
[8] Ist Nazl Fis Nucl, Sez Ferrara, I-44100 Ferrara, Italy
[9] Univ Florence, Dipartimento Fis, I-50125 Florence, Italy
[10] Ist Nazl Fis Nucl, Sez Firenze, I-50125 Florence, Italy
[11] Johannes Gutenberg Univ Mainz, Inst Phys, D-55099 Mainz, Germany
[12] Univ Paris 11, CNRS, IN2P3, Lab Accelerateur Lineaire, F-91406 Orsay, France
[13] Univ Perugia, Dipartimento Fis, I-06100 Perugia, Italy
[14] Ist Nazl Fis Nucl, Sez Perugia, I-06100 Perugia, Italy
[15] Scuola Normale Super Pisa, Dipartimento Fis, I-56100 Pisa, Italy
[16] Ist Nazl Fis Nucl, Sez Pisa, I-56100 Pisa, Italy
[17] CEA Saclay, DAPNIA, DSM, F-91191 Gif Sur Yvette, France
[18] Univ Siegen, Fachbereich Phys, D-57068 Siegen, Germany
[19] Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, Italy
[20] Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy
[21] Soltan Inst Nucl Studies, High Energy Phys Lab, PL-00681 Warsaw, Poland
[22] Austrian Acad Sci, Inst Hochenergiephys, A-1050 Vienna, Austria
[23] Dipartimento Fis, Bologna, Italy
[24] Ist Nazl Fis Nucl, I-40126 Bologna, Italy
[25] Univ Modena, Dipartimento Fis, I-41100 Modena, Italy
[26] Univ Los Andes, Dept Fis, Merida 5101A, Venezuela
来源：
EUROPEAN PHYSICAL JOURNAL C | 2000年 / 12卷 / 01期
关键词：
D O I：
10.1007/s100529900232
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：
A new precision measurement of the Xi(0) mass has been performed at the NA48 experiment at the CERN SPS. The value obtained is [1319.82+/-0.06 (stat.) +/-0.2 (syst.)] MeV/c(2). The branching ratios of Xi(0) radiative decays have been measured as: Br(Xi --> Lambda gamma) = [1.90 +/- 0.34(stat.) +/- 0.19(syst.)].10(-3) and Br(Xi --> Sigma(0)gamma) = [3.14 +/- 0.76(stat.) +/- 0.32(syst.).10(-3).
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页码：69 / 76
页数：8
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