Interference Study of the χc0(13P0) in the reaction (p)over-bar-p→π0π0 -: art. no. 091801

被引：14

作者：

Andreotti, M

Bagnasco, S

Baldini, W

Bettoni, D

Borreani, G

Buzzo, A

Calabrese, R

Cester, R

Cibinetto, G

Dalpiaz, P

Garzoglio, G

Gollwitzer, KE

Graham, M

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

Pedlar, TK

Pordes, S

Robutti, E

Roethel, W

Rosen, JL

Rumerio, P

Rusack, R

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

[5] Univ Genoa, 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] Ist Nazl Fis Nucl, I-10125 Turin, Italy

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

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 91卷 / 09期

关键词：

D O I：

10.1103/PhysRevLett.91.091801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Fermilab experiment E835 has observed (p) over barp annihilation production of the charmonium state chi(c0) and its subsequent decay into pi(0)pi(0). Although the resonant amplitude is an order of magnitude smaller than that of the nonresonant continuum production of pi(0)pi(0), an enhanced interference signal is evident. A partial wave expansion is used to extract physics parameters. The amplitudes J=0 and 2, of comparable strength, dominate the expansion. Both are accessed by L=1 in the entrance (p) over barp channel. The product of the input and output branching fractions is determined to be B((p) over barp-->chi(c0))xB(chi(c0)-->pi(0)pi(0))=(5.09+/-0.81+/-0.25)x10(-7).

引用

页数：4

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