First observation of the decay Ds+-->pn.

نویسندگان

S B Athar

R Patel

J Yelton

P Rubin

B I Eisenstein

I Karliner

S Mehrabyan

N Lowrey

M Selen

E J White

J Wiss

R E Mitchell

M R Shepherd

D Besson

T K Pedlar

D Cronin-Hennessy

K Y Gao

J Hietala

Y Kubota

T Klein

B W Lang

R Poling

A W Scott

P Zweber

S Dobbs

Z Metreveli

K K Seth

A Tomaradze

J Libby

A Powell

G Wilkinson

K M Ecklund

W Love

V Savinov

A Lopez

H Mendez

J Ramirez

J Y Ge

D H Miller

I P J Shipsey

B Xin

G S Adams

M Anderson

J P Cummings

I Danko

D Hu

B Moziak

J Napolitano

Q He

J Insler

H Muramatsu

C S Park

E H Thorndike

F Yang

M Artuso

S Blusk

S Khalil

J Li

R Mountain

S Nisar

K Randrianarivony

N Sultana

T Skwarnicki

S Stone

J C Wang

L M Zhang

G Bonvicini

D Cinabro

M Dubrovin

A Lincoln

P Naik

J Rademacker

D M Asner

K W Edwards

J Reed

R A Briere

T Ferguson

G Tatishvili

H Vogel

M E Watkins

J L Rosner

J P Alexander

D G Cassel

J E Duboscq

R Ehrlich

L Fields

L Gibbons

R Gray

S W Gray

D L Hartill

B K Heltsley

D Hertz

J M Hunt

J Kandaswamy

D L Kreinick

V E Kuznetsov

J Ledoux

H Mahlke-Krüger

D Mohapatra

P U E Onyisi

J R Patterson

D Peterson

D Riley

A Ryd

A J Sadoff

X Shi

S Stroiney

W M Sun

T Wilksen

چکیده

Using e+e--->Ds*-Ds+ data collected near the peak Ds production energy, Ecm=4170 MeV, with the CLEO-c detector, we present the first observation of the decay Ds+-->pn. We measure a branching fraction B(Ds+-->pn)=(1.30+/-0.36(-0.16)+0.12)x10(-3). This is the first observation of a charmed meson decaying into a baryon-antibaryon final state.

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