%O © 2006 The American Physical Society
%D 2006
%V 97
%L discovery1308526
%I AMERICAN PHYSICAL SOC
%N 24
%A N Gabyshev
%A K Abe
%A K Abe
%A I Adachi
%A H Aihara
%A Y Asano
%A V Aulchenko
%A T Aushev
%A AM Bakich
%A U Bitenc
%A I Bizjak
%A S Blyth
%A A Bondar
%A A Bozek
%A M Bracko
%A J Brodzicka
%A TE Browder
%A P Chang
%A Y Chao
%A A Chen
%A WT Chen
%A BG Cheon
%A R Chistov
%A SK Choi
%A Y Choi
%A A Chuvikov
%A S Cole
%A J Dalseno
%A M Danilov
%A M Dash
%A A Drutskoy
%A S Eidelman
%A Y Enari
%A S Fratina
%A T Gershon
%A G Gokhroo
%A B Golob
%A A Gorisek
%A T Hara
%A H Hayashii
%A M Hazumi
%A T Hokuue
%A Y Hoshi
%A S Hou
%A WS Hou
%A YB Hsiung
%A T Iijima
%A A Imoto
%A K Inami
%A A Ishikawa
%A R Itoh
%A M Iwasaki
%A Y Iwasaki
%A JH Kang
%A JS Kang
%A SU Kataoka
%A N Katayama
%A H Kawai
%A T Kawasaki
%A HR Khan
%A H Kichimi
%A HJ Kim
%A HO Kim
%A SK Kim
%A SM Kim
%A K Kinoshita
%A S Korpar
%A P Krokovny
%A S Kumar
%A CC Kuo
%A A Kuzmin
%A YJ Kwon
%A JS Lange
%A G Leder
%A T Lesiak
%A SW Lin
%A F Mandl
%A T Matsumoto
%A Y Mikami
%A W Mitaroff
%A H Miyake
%A H Miyata
%A R Mizuk
%A T Nagamine
%A Y Nagasaka
%A E Nakano
%A M Nakao
%A H Nakazawa
%A Z Natkaniec
%A S Nishida
%A O Nitoh
%A S Ogawa
%A T Ohshima
%A T Okabe
%A S Okuno
%A SL Olsen
%A Y Onuki
%A H Ozaki
%A H Palka
%A CW Park
%A H Park
%A N Parslow
%A LS Peak
%A R Pestotnik
%A LE Piilonen
%A M Rozanska
%A H Sagawa
%A Y Sakai
%A N Sato
%A T Schietinger
%A O Schneider
%A AJ Schwartz
%A K Senyo
%A R Seuster
%A ME Sevior
%A H Shibuya
%A V Sidorov
%A JB Singh
%A A Somov
%A R Stamen
%A S Stanic
%A M Staric
%A T Sumiyoshi
%A SY Suzuki
%A O Tajima
%A F Takasaki
%A K Tamai
%A N Tamura
%A M Tanaka
%A Y Teramoto
%A XC Tian
%A T Tsuboyama
%A T Tsukamoto
%A S Uehara
%A T Uglov
%A K Ueno
%A S Uno
%A P Urquijo
%A G Varner
%A KE Varvell
%A S Villa
%A CH Wang
%A MZ Wang
%A QL Xie
%A BD Yabsley
%A A Yamaguchi
%A H Yamamoto
%A Y Yamashita
%A M Yamauchi
%A H Yang
%A CC Zhang
%A J Zhang
%A LM Zhang
%A ZP Zhang
%A V Zhilich
%A D Zontar
%A Belle Cobbaration
%T Study of decay mechanisms in B-->Lambda(+)(c)p pi(-) decays and observation of low-mass structure in the Lambda(+)(c)p system
%J PHYS REV LETT
%K BELLE
%X Using a sample of 152x10(6) B (B) over bar pairs accumulated with the Belle detector at the KEKB e(+)e(-) collider, we study the decay mechanism of three-body charmed decay B-->Lambda(+)(c)(p) over bar pi(-). The intermediate two-body decay B-->Sigma(c)(2455)(0)(p) over bar is observed for the first time with a branching fraction of (3.7 +/- 0.7 +/- 0.4 +/- 1.0)x10(-5) and a statistical significance of 8.4 sigma. We also observe a low-mass enhancement in the (Lambda(+)(c)(p) over bar) system, which can be parametrized as a Breit-Wigner function with a mass of (3.35(-0.02)(+0.01)+/- 0.02) GeV/c(2) and a width of (0.07(-0.03)(+0.04)+/- 0.04) GeV/c(2). We measure its branching fraction to be (3.9(-0.7)(+0.8)+/- 0.4 +/- 1.0)x10(-5) with a statistical significance of 6.2 sigma. The errors are statistical, systematic, and that of the Lambda(+)(c)-> pK(-)pi(+) decay branching fraction.