Dalitz plot analysis of the decay D+ → K- π+ π+ and indication of a low-mass scalar Kπ resonance -: art. no. 121801

被引：243

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, GF

Gagnon, P

Göbel, 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] Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil

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

[4] Univ Cincinnati, Cincinnati, OH 45221 USA

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

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

[7] IIT, Chicago, IL 60616 USA

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

[9] Univ Massachusetts, Amherst, MA 01003 USA

[10] Princeton Univ, Princeton, NJ 08544 USA

[11] Univ Autonoma Puebla, Puebla 72570, Mexico

[12] Univ Republica, Montevideo, Uruguay

[13] Univ Fed Itajuba, Itajuba, Brazil

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

[15] Stanford Univ, Stanford, CA 94305 USA

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

[17] Tufts Univ, Medford, MA 02155 USA

[18] Univ Wisconsin, Madison, WI 53706 USA

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

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.89.121801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the Dalitz plot of the decay D+ --> K- pi(+) pi(+) with a sample of 15090 events from Fermilab experiment E791. Modeling the decay amplitude as the coherent sum of known Kpi resonances and a uniform nonresonant term, we do not obtain an acceptable fit If we allow the mass and width of the K-0*(1430) to float, we obtain values consistent with those from PDG but the chi(2) per degree of freedom of the fit is still unsatisfactory. A good fit is found when we allow for the presence of an additional scalar resonance, with mass 797 +/- 19 +/- 43 MeV/c(2) and width 410 +/- 43 +/- 87 MeV/c(2). The mass and width of the K-0*(1430) become 1459 +/- 7 +/- 5 MeV/c(2) and 175 +/- 12 +/- 12 MeV/c(2), respectively. Our results provide new information on the scalar sector in hadron spectroscopy.

引用

页码：121801 / 121801

页数：5