新态衰变为Xi（*）π的证据。

Evidence of New States Decaying into Xi(*)(c)pi.

作者信息

Csorna S E, Danko I, McLean K W, Xu Z, Godang R, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Zhou G J, Bornheim A, Lipeles E, Pappas S P, Schmidtler M, Shapiro A, Sun W M, Weinstein A J, Jaffe D E, Masek G, Paar H P, Asner D M, Eppich A, Hill T S, Morrison R J, Briere R A, Chen G P, Ferguson T, Vogel H, Gritsan A, Alexander J P, Baker R, Bebek C, Berger B E, Berkelman K, Blanc F, Boisvert V, Cassel D G, Drell P S, Duboscq J E, Ecklund K M, Ehrlich R, Foland A D, Gaidarev P, Galik R S, Gibbons L, Gittelman B, Gray S W, Hartill D L, Heltsley B K, Hopman P I, Hsu L, Jones C D, Kandaswamy J, Kreinick D L, Lohner M, Magerkurth A, Meyer T O, Mistry N B, Nordberg E, Palmer M, Patterson J R, Peterson D, Riley D, Romano A, Thayer J G, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Avery P, Prescott C, Rubiera A I, Stoeck H, Yelton J, Brandenburg G, Ershov A, Kim D Y, Wilson R, Bergfeld T, Eisenstein B I, Ernst J, Gladding G E, Gollin G D, Hans R M, Johnson E, Karliner I, Marsh M A, Plager C, Sedlack C, Selen M, Thaler J J, Williams J, Edwards K W, Janicek R, Patel P M, Sadoff A J, Ammar R, Bean A, Besson D, Zhao X, Anderson S, Frolov V V, Kubota Y, Lee S J, Mahapatra R, O'Neill J J, Poling R, Riehle T, Smith A, Stepaniak C J, Urheim J, Ahmed S, Alam M S, Athar S B, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Eckhart E, Gan K K, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar T K, Schwarthoff H, Thayer J B, von Toerne E, Zoeller M M, Richichi S J, Severini H, Skubic P, Undrus A, Savinov V, Chen S, Fast J, Hinson J W, Lee J, Miller D H, Shibata E I, Shipsey I P, Pavlunin V, Cronin-Hennessy D, Lyon A L, Thorndike E H, Coan T E, Fadeyev V, Gao Y S, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Ayad R, Boulahouache C, Bukin K, Dambasuren E, Majumder G, Moneti G C, Mountain R, Schuh S, Skwarnicki T, Stone S, Wang J C, Wolf A, Wu J, Kopp S, Kostin M, Mahmood A H

机构信息

Vanderbilt University, Nashville, Tennessee 37235.

出版信息

Phys Rev Lett. 2001 May 7;86(19):4243-6. doi: 10.1103/PhysRevLett.86.4243.

DOI:10.1103/PhysRevLett.86.4243

PMID:11328145

Abstract

Using 13.7 fb(-1) of data recorded by the CLEO detector at Cornell Electron Storage Ring, we report evidence of two new charmed baryons: one decaying into Xi(0')(c)pi(+) with the subsequent decay Xi(0')(c)-->Xi(0)(c)gamma, and its isospin partner decaying into Xi(+')(c)pi(-) followed by Xi(+')(c)-->Xi(+)(c)gamma. We measure the following mass differences for the two states: M(Xi(0)(c)gammapi(+))-M(Xi(0)(c)) = 318.2+/-1.3+/-2.9 MeV and M(Xi(+)(c)gammapi(-))-M(Xi(+)(c)) = 324.0+/-1.3+/-3.0 MeV. We interpret these new states as the J(P) = 1 / 2(-) Xi(c1) particles, the charmed-strange analogs of the Lambda(+)(c1)(2593).

摘要

利用康奈尔电子储存环上的CLEO探测器记录的13.7 fb⁻¹的数据，我们报告了两种新的粲重子的证据：一种衰变为Ξ⁰'(c)π⁺，随后Ξ⁰'(c)衰变为Ξ⁰(c)γ，其同位旋伙伴衰变为Ξ⁺'(c)π⁻，接着Ξ⁺'(c)衰变为Ξ⁺(c)γ。我们测量了这两种状态的以下质量差：M(Ξ⁰(c)γπ⁺) - M(Ξ⁰(c)) = 318.2 ± 1.3 ± 2.9 MeV以及M(Ξ⁺(c)γπ⁻) - M(Ξ⁺(c)) = 324.0 ± 1.3 ± 3.0 MeV。我们将这些新状态解释为J(P) = 1 / 2⁻的Ξ(c1)粒子，即Λ⁺(c1)(2593)的粲奇异类似物。