Experimental evidence for a light and broad scalar resonance in D+ → π-π+π+ decay

被引：336

作者：

Aitala, EM ^{[1
]}

Amato, S

Anjos, JC

Appel, JA

Ashery, D

Banerjee, S

Bediaga, I

Blaylock, G

Bracker, SB

Burchat, PR

Burnstein, RA

Carter, T

Carvalho, HS

Copty, NK

Cremaldi, LM

Darling, C

Denisenko, K

Devmal, S

Fernandez, A

Fox, GE

Gagnon, P

Gobel, C

Gounder, K

Halling, AM

Herrera, G

Hurvits, G

James, C

Kasper, PA

Kwan, S

Langs, DC

Leslie, J

Lundberg, B

Magnin, J

Massafferri, A

MayTal-Beck, S

Meadows, B

Neto, JRTD

Mihalcea, D

Milburn, RH

de Miranda, JM

Napier, A

Nguyen, A

d'Oliveira, AB

O'Shaughnessy, K

Peng, KC

Perera, LP

Purohit, MV

Quinn, B

Radeztsky, S

Rafatian, A

机构：

[1] Univ Mississippi Oxford, University, MS 38677 USA

[2] Univ Massachusetts, Amherst, MA 01003 USA

[3] Kansas State Univ, Manhattan, KS 66506 USA

[4] IIT, Chicago, IL 60616 USA

[5] Fermi Natl Accelerator Lab, Batavia, IL 60510 USA

[6] CINVESTAV, Mexico City 14000, DF, Mexico

[7] Univ Cincinnati, Cincinnati, OH 45221 USA

[8] Univ Calif Santa Cruz, Santa Cruz, CA 95064 USA

[9] Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil

[10] Princeton Univ, Princeton, NJ 08544 USA

[11] Univ Autonoma Puebla, Puebla 72570, Mexico

[12] Univ S Carolina, Columbia, SC 29208 USA

[13] Stanford Univ, Stanford, CA 94305 USA

[14] Tel Aviv Univ, IL-69978 Tel Aviv, Israel

[15] Tufts Univ, Medford, MA 02155 USA

[16] Univ Wisconsin, Madison, WI 53706 USA

[17] Yale Univ, New Haven, CT 06511 USA

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.86.770

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

From a sample of 1172 +/- 61 D+ --> pi (-) pi (+) pi (+) decays, we find Gamma (D+ --> pi (-) pi (+) pi (+))/Gamma (D+ --> K- pi (+) pi (+)) = 0.0311 +/- 0.0018(-0.0026)(+0.0016). Using a coherent amplitude analysis to fit the Dalitz plot of these decays, we find strong evidence that a scalar resonance of mass 478(-23)(+24) +/- 17 MeV/c(2) and width 324(-40)(+42) +/- LI meV/c(2) accounts for approximately half or all decays.

引用

页码：770 / 774

页数：5

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