Measurement of the resonance parameters of the X1(13P1) and X2(13P2) states of charmonium formed in antiproton-proton annihilations

被引：17
|
作者：
Andreotti, M [1 ]
Bagnasco, S
Baldini, W
Bettoni, D
Borreani, G
Buzzo, A
Calabrese, R
Cester, R
Cibinetto, G
Dalpiaz, P
Garzoglio, G
Gollwitzer, KE
Graham, A
Hu, M
Joffe, D
Kasper, J
Lasio, G
Lo Vetere, M
Luppi, E
Macrì, M
Mandelkern, M
Marchetto, F
Marinelli, M
Menichetti, E
Metreveli, Z
Mussa, R
Negrini, M
Obertino, MM
Pallavicini, M
Pastrone, N
Patrignani, C
Pordes, S
Robutti, E
Roethel, W
Rosen, J
Rumerio, P
Rusack, RW
Santroni, A
Schultz, J
Seo, SH
Seth, KK
Stancari, G
Stancari, M
Tomaradze, A
Uman, I
Vidnovic, T
Werkema, S
Zweber, P
机构：
[1] Inst Nzl Fis Nucl, I-44100 Ferrara, Italy
[2] Univ Ferrara, I-44100 Ferrara, Italy
[3] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA
[4] Inst Nazl Fis Nucl, I-16146 Genoa, Italy
[5] Univ Genoa, I-16146 Genoa, Italy
[6] Univ Calif Irvine, Irvine, CA 92697 USA
[7] Northwestern Univ, Evanston, IL 60208 USA
[8] Inst Nazl Fis Nucl, I-10125 Turin, Italy
[9] Univ Turin, I-10125 Turin, Italy
[10] Univ Minnesota, Minneapolis, MN 55455 USA
来源：
NUCLEAR PHYSICS B | 2005年 / 717卷 / 1-2期
关键词：
D O I：
10.1016/j.nuclphysb.2005.03.042
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：
We have studied the P-3(J) (chi(C)) states of charmonium in formation by antiproton-proton annihilations in experiment E835 at the Fermilab Antiproton Source. We report new measurements of the mass, width, and B(chi(cJ) -> (p) over barp)Gamma(chi(cJ) -> J/psi + anything) for the chi(c1) and chi(c2) by means of the inclusive reaction (p) over barp -> X-cJ -> J/psi + anything -> (e(+)e(-)) + anything. Using the sub-sample of events where chi(cJ) -> gamma + J/psi -> y + (e(+)e(-)) is fully reconstructed, we derive B(chi(cJ) -> (p) over barp)Gamma(chi(cJ) -> J/psi + gamma). We summarize the results of the E760 (updated) and E835 measurements of mass, width and B(chi(cJ) -> (p) over barp)Gamma(chi(cJ) -> J/psi + gamma) (J = 0, 1, 2) and discuss the significance of these measurements. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：34 / 47
页数：14
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