New measurements of the resonance parameters of the χc0(13P0) state of charmonium

被引：34

作者：

Bagnasco, S

Baldini, W

Bettoni, D

Borreani, G

Buzzo, A

Calabrese, R

Cester, R

Cibinetto, G

Dalpiaz, P

Garzoglio, G

Gollwitzer, K

Graham, M

Hu, M

Joffe, D

Kasper, J

Lasio, G

LoVetere, M

Luppi, E

Macrì, M

Mandelkern, M

Marchetto, F

Marinelli, M

Menichetti, E

Metreveli, Z

Mussa, R

Negrini, M

Obertino, M

Pallavicini, M

Pastrone, N

Patrignani, C

Pordes, S

Robutti, E

Roethel, W

Rosen, J

Rumerio, P

Rusack, R

Santroni, A

Schultz, J

Seo, SH

Seth, KK

Stancari, G

Stancari, M

Tomaradze, A

Vidnovic, T

Werkema, S

Zweber, P

机构：

[1] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA

[2] Univ Ferrara, I-44100 Ferrara, Italy

[3] Ist Nazl Fis Nucl, I-44100 Ferrara, Italy

[4] Univ Genoa, I-16146 Genoa, Italy

[5] Ist Nazl Fis Nucl, I-16146 Genoa, Italy

[6] Univ Calif Irvine, Irvine, CA 92697 USA

[7] Univ Minnesota, Minneapolis, MN 55455 USA

[8] Northwestern Univ, Evanston, IL 60208 USA

[9] Univ Turin, I-10125 Turin, Italy

[10] Ist Nazl Fis Nucl, I-10125 Turin, Italy

来源：

PHYSICS LETTERS B | 2002年 / 533卷 / 3-4期

关键词：

D O I：

10.1016/S0370-2693(02)01657-X

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The resonance parameters of the X-c0, the 1(3)P(0) state of charmonium, have been measured at the Fermilab Antiproton Accumulator in the reaction (p) over barp --> chi(c0) --> gammaJ/psi --> gamma(e(+)e(-)). A large data sample collected during the year 2000 run yields the results: M(chi(c0)) = 3415.4 +/- 0.4 +/- 0.2 MeV/c(2), Gamma(chi(c0)) = 9.8 +/- 1.0 +/- 0.1 MeV, B(chi(c0) --> (p) over barp) x B(chi(c0) --> gammaJ/psi) x B(J/psi --> (e(+)e(-))) = (1.61 +/- 0.11 +/- 0.08) x 10(-7). Taking B(chi(c0) --> gammaJ/psi) and B(J/psi --> e(+)e(-)) from the literature, we obtain B(chi(c0) --> (p) over barp) = (4.1 +/- 0.3(-0.9)(+1.6)) x 10(-4) and Gamma(chic) --> (p) over barp) = (4.0 +/- 0.4(-0.9)(+1.6)) keV. (C) 2002 Published by Elsevier Science B.V.

引用

页码：237 / 242

页数：6

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