Study of η and η′ production in (n)over-bar-p annihilations

被引：5

作者：

Filippi, A

Agnello, M

Botta, E

Bressani, T

Calvo, D

Costa, S

D'Isep, F

Feliciello, A

Iazzi, F

Macello, S

Minetti, B

Mirfakhraee, N

Balestra, F

Bussa, MP

Busso, L

Cerello, P

Denisov, O

Garfagnini, R

Grasso, A

Maggiora, A

Panzarasa, A

Panzieri, D

Tosello, F

Bertin, A

Bruschi, M

Capponi, M

De Castro, S

Donà, R

Galli, D

Giacobbe, B

Marconi, U

Massa, I

Piccinini, M

Poli, M

Cesari, NS

Spighi, R

Vagnoni, V

Vecchi, S

Villa, M

Vitale, A

Zoccoli, A

Bianconi, A

Bonomi, G

Rizzini, EL

Venturelli, L

Zenoni, A

Cicalò, C

Masoni, A

Mauro, S

Puddu, G

机构：

[1] Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy

[2] Univ Turin, Dipartimento Fis Sperimentale, Turin, Italy

[3] Politecn Torino, Turin, Italy

[4] Univ Turin, Dipartimento Fis Gen A Avogadro, Turin, Italy

[5] Univ Bologna, Dipartimento Fis, Bologna, Italy

[6] Ist Nazl Fis Nucl, Sez Bologna, I-40126 Bologna, Italy

[7] Univ Brescia, Dipartimento Chim & Fis Ingn & Mat, Brescia, Italy

[8] Ist Nazl Fis Nucl, Sez Pavia, I-27100 Pavia, Italy

[9] Univ Cagliari, Dipartimento Fis, Cagliari, Italy

[10] Ist Nazl Fis Nucl, Sez Cagliari, Cagliari, Italy

[11] Joint Inst Nucl Res, Moscow 101000, Russia

[12] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

[13] Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy

[14] Univ Pavia, Dipartimento Fis Nucl & Teor, I-27100 Pavia, Italy

[15] Ist Nazl Fis Nucl, Sez Pavia, I-27100 Pavia, Italy

[16] Univ Trieste, Ist Fis, Trieste, Italy

[17] Ist Nazl Fis Nucl, Sez Trieste, Trieste, Italy

来源：

PHYSICS LETTERS B | 1999年 / 471卷 / 2-3期

关键词：

antineutron-proton annihilation in flight; measured eta and eta ' production; absolute annihilation frequencies and cross sections; pseudoscalar physical states mixing angle; OBELIX spectrometer;

D O I：

10.1016/S0370-2693(99)01316-7

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The annihilation fractions and cross sections for the <(n)over bar p> annihilation reaction in flight (similar to 50-400 MeV/c) into eta pi(+) and eta'pi(+) final states have been measured. The first ones follow the trend expected for P wave annihilations. From the ratios of the yields an evaluation of the pseudoscalar mixing angle in the standard form is possible. The value found shows that for pseudoscalar meson production from P wave the Quark Line Rule is not grossly violated. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：263 / 270

页数：8

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