Multidimensional resonance analysis of Λc+ → pK- π+

被引：32

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

Gobel, C

Gounder, K

Halling, AM

Herrera, G

Hurvits, C

James, C

Kasper, PA

Kwan, S

Langs, DC

Leslie, J

Lundberg, B

Magnin, J

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

Reay, NW

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 07000, 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 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：

PHYSICS LETTERS B | 2000年 / 471卷 / 04期

基金：

美国国家科学基金会; 美国能源部;

关键词：

multidimensional; resonance; Lambda(c); polarization;

D O I：

10.1016/S0370-2693(99)01397-0

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the results of a five-dimensional resonant amplitude analysis of the Lambda(c)(+) --> pK(-)pi(+) system based on 946 +/- 38 reconstructed decays. These data were produced in 500 GeV/c pi(-)-N interactions by Fermilab experiment E791. We report measurements of the amplitudes for Lambda(c)(+) decay into nonresonant pK(-)pi(+) and to p (K) over bar*(0)(890), Delta(++)(1232)K-, and Lambda(1520)pi(+) and we comment on other possible resonant enhancements. This is the first complete amplitude analysis of the Lambda(c)(+) --> pK(-)pi(+) system. We find that (54.8 +/- 5.5 +/- 3.5)% of the decays are nonresonant, (19.5 +/- 2.6 +/- 1.8)% of the decays are via the (K) over bar*(0) resonance, (18.0 +/- 2.9 +/- 2.9)% of the decays are via the Delta(++) resonance, and (7.7 +/- 1.8 +/- 1.1)% of the decays are via the Lambda(1520) resonance. We find evidence for an increasingly negative polarization of the Lambda(c)(+) baryons as a function of p(T)(2), in agreement with a recent model [W.G.D. Dharmaratna, G.R. Goldstein, Phys. Rev. D 53 (1996) 1073; G.R. Goldstein, hep-ph/9907573] and with a related measurement [M. Jezabek, K. Rybicki, R. Rylko, Phys. Lett. B 286 (1992) 175]. (C) 2000 Published by Elsevier Science B.V. All rights reserved.

引用

页码：449 / 459

页数：11

共 18 条

[1] Asymmetries between the production of D+ and D- mesons from 500 GeV/c pi(-)-nucleus interactions as a function of x(F) and p(t)(2) [J].

Aitala, EM ;

Amato, S ;

Anjos, JC ;

Appel, JA ;

Ashery, D ;

Banerjee, S ;

Bediaga, I ;

Blaylock, G ;

Bracker, SB ;

Burchat, PR ;

Burnstein, RA ;

Carter, T ;

Carvalho, HS ;

Costa, I ;

Cremaldi, LM ;

Darling, C ;

Denisenko, K ;

Fernandez, A ;

Gagnon, P ;

Gerzon, S ;

Gobel, C ;

Gounder, K ;

Granite, D ;

Halling, AM ;

Herrera, G ;

Hurvits, G ;

James, C ;

Kasper, PA ;

Kondakis, N ;

Kwan, S ;

Langs, DC ;

Leslie, J ;

Lichtenstadt, J ;

Lundberg, B ;

Manacero, A ;

MayTalBeck, S ;

Meadows, B ;

deMello, JRT ;

Milburn, RH ;

deMiranda, JM ;

Napier, A ;

Nguyen, A ;

dOliveira, AB ;

OShaugnessy, K ;

Peng, KC ;

Perera, LP ;

Purohit, MV ;

Quinn, B ;

Radeztsky, S ;

Rafatian, A .

PHYSICS LETTERS B, 1996, 371 (1-2) :157-162

[2]

AITALA EM, 1999, EUR PHYS J C, V4, P1

[3] A STUDY OF K-PI+ SCATTERING IN THE REACTION K-P-]K-PI+N AT 11 GEV/C [J].

ASTON, D ;

AWAJI, N ;

BIENZ, T ;

BIRD, F ;

DAMORE, J ;

DUNWOODIE, W ;

ENDORF, R ;

FUJII, K ;

HAYASHII, H ;

IWATA, S ;

JOHNSON, WB ;

KAJIKAWA, R ;

KUNZ, P ;

LEITH, DWGS ;

LEVINSON, L ;

MATSUI, T ;

MEADOWS, BT ;

MIYAMOTO, A ;

NUSSBAUM, M ;

OZAKI, H ;

PAK, CO ;

RATCLIFF, BN ;

SCHULTZ, D ;

SHAPIRO, S ;

SHIMOMURA, T ;

SINERVO, PK ;

SUGIYAMA, A ;

SUZUKI, S ;

TARNOPOLSKY, G ;

TAUCHI, T ;

TOGE, N ;

UKAI, K ;

WAITE, A ;

WILLIAMS, S .

NUCLEAR PHYSICS B, 1988, 296 (03) :493-526

[4] A MEASUREMENT OF 2 RESONANT CONTRIBUTIONS IN THE LAMBDA-C+ BRANCHING RATIOS [J].

BASILE, M ;

ROMEO, GC ;

CIFARELLI, L ;

CONTIN, A ;

DALI, G ;

DICESARE, P ;

ESPOSITO, B ;

GIUSTI, P ;

MASSAM, T ;

PALMONARI, F ;

SARTORELLI, G ;

VALENTI, G ;

ZICHICHI, A .

NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA A-NUCLEI PARTICLES AND FIELDS, 1981, 62 (01) :14-20

[5]

Bishop Christopher M., 1995, NEURAL NETWORKS PATT, P55

[6]

BOZEK A, 1993, PHYS LETT B, V312, P247, DOI 10.1016/0370-2693(93)90519-N

[7] Review of Particle Physics [J].

The European Physical Journal C - Particles and Fields, 1998, 3 (1-4) :1-783

[8] Single quark polarization in quantum chromodynamics subprocesses [J].

Dharmaratna, WGD ;

Goldstein, GR .

PHYSICAL REVIEW D, 1996, 53 (03) :1073-1086

[9] ANALYSIS OF 3 D-]K-PI-PI DALITZ PLOTS [J].

FRABETTI, PL ;

CHEUNG, HWK ;

CUMALAT, JP ;

DALLAPICCOLA, C ;

GINKEL, JF ;

GREENE, SV ;

JOHNS, WE ;

NEHRING, MS ;

BUTLER, JN ;

CIHANGIR, S ;

GAINES, I ;

GARBINCIUS, PH ;

GARREN, L ;

GOURLAY, SA ;

HARDING, DJ ;

KASPER, P ;

KREYMER, A ;

LEBRUN, P ;

SHUKLA, S ;

VITTONE, M ;

BIANCO, S ;

FABBRI, FL ;

SARWAR, S ;

ZALLO, A ;

CULBERTSON, R ;

GARDNER, RW ;

GREENE, R ;

WISS, J ;

ALIMONTI, G ;

BELLINI, G ;

CACCIANIGA, B ;

CINQUINI, L ;

DICORATO, M ;

GIAMMARCHI, M ;

INZANI, P ;

LEVERARO, F ;

MALVEZZI, S ;

MENASCE, D ;

MERONI, E ;

MORONI, L ;

PEDRINI, D ;

PERASSO, L ;

SALA, A ;

SALA, S ;

TORRETTA, D ;

BUCHHOLZ, D ;

CLAES, D ;

GOBBI, B ;

OREILLY, B ;

BISHOP, JM .

PHYSICS LETTERS B, 1994, 331 (1-2) :217-226

[10] ON THE GENERAL THEORY OF COLLISIONS FOR PARTICLES WITH SPIN [J].

JACOB, M ;

WICK, GC .

ANNALS OF PHYSICS, 1959, 7 (04) :404-428

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