First observation of the Cabibbo-suppressed decays Ξc+ → Σ+ π- π+ and Ξc+ → Σ- π+ π+ and measurement of their branching ratios

C.O Escobar; N Estrada; A.V Evdokimov; I.S Filimonov; F.G Garcia; M Gaspero; I Giller; V.L Golovtsov; P Gouffon; E Gülmez; Kangling He; M Iori; S.Y Jun; M Kaya; J Kilmer; V.T Kim; L.M Kochenda; I Konorov; A.P Kozhevnikov; A.G Krivshich; H Krü; M.A Kubantsev; V.P Kubarovsky; A.I Kulyavtsev; N.P Kuropatkin; V.F Kurshetsov; A Kushnirenko; S Kwan; J Lach; A Lamberto; L.G Landsberg; I Larin; E.M Leikin; Yunshan Li; G Ló; M Luksys; T Lungov; V.P Maleev; D Mao; Chensheng Mao; Zhenlin Mao; E Vázquez-Jáuregui; J Engelfried; P Mathew; U Akgun; M Mattson; V Matveev; G Alkhazov; E McCliment; J Amaro-Reyes; M.A Moinester; A.G Atamantchouk; A.S Ayan; V.V Molchanov; M.Y Balatz; A Morelos; A Blanco-Covarrubias; K.D Nelson; N.F Bondar; A.V Nemitkin; P.S Cooper; P.V Neoustroev; L.J Dauwe; C Newsom; A.P Nilov; G.V Davidenko; U Dersch; S.B Nurushev; A.G Dolgolenko; A Ocherashvili; G.B Dzyubenko; Y Onel; R Edelstein; E Ozel; L Emediato; S Ozkorucuklu; A.M.F Endler; A Penzo; I Eschrich; S.V Petrenko; P Pogodin; M Procario; V.A Prutskoi; E Ramberg; G.F Rappazzo; B.V Razmyslovich; V.I Rud; J Russ; J.L Sánchez-López; P Schiavon; J Simon; A.I Sitnikov; D Skow; V.J Smith; M Srivastava; V Steiner; V Stepanov; L Stutte; M Svoiski; N.K Terentyev; G.P Thomas; I Torres; L.N Uvarov; A.N Vasiliev; D.V Vavilov; V.S Verebryusov; V.A Victorov; V.E Vishnyakov; A.A Vorobyov; K Vorwalter; J You; Wenheng Zhao; Shuchen Zheng; R Zukanovich-Funchal; SELEX Collaboration

doi:10.1016/j.physletb.2008.07.072

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First observation of the Cabibbo-suppressed decays Ξc+ → Σ+ π- π+ and Ξc+ → Σ- π+ π+ and measurement of their branching ratios

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First observation of the Cabibbo-suppressed decays Ξc+ → Σ+ π- π+ and Ξc+ → Σ- π+ π+ and measurement of their branching ratios

C.O Escobar, N Estrada, A.V Evdokimov, I.S Filimonov, F.G Garcia, M Gaspero, I Giller, V.L Golovtsov, P Gouffon, E Gülmez, …

Physics letters. B, Vol.666(4), pp.299-304

09/04/2008

DOI: 10.1016/j.physletb.2008.07.072

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Abstract

We report the first observation of two Cabibbo-suppressed decay modes, Ξc+ → Σ+ π- π+ and Ξc+ → Σ- π+ π+. We observe 59 ± 14 over a background of 87, and 22 ± 8 over a background of 13 events, respectively, for the signals. The data were accumulated using the SELEX spectrometer during the 1996-1997 fixed target run at Fermilab, chiefly from a 600 GeV / cΣ- beam. The branching ratios of the decays relative to the Cabibbo-favored Ξc+ → Ξ- π+ π+ are measured to be B (Ξc+ → Σ+ π- π+) / B (Ξc+ → Ξ- π+ π+) = 0.48 ± 0.20, and B (Ξc+ → Σ- π+ π+) / B (Ξc+ → Ξ- π+ π+) = 0.18 ± 0.09, respectively. We also report branching ratios for the same decay modes of the Λc+ relative to Λc+ → p K- π+

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Title: Subtitle: First observation of the Cabibbo-suppressed decays Ξc+ → Σ+ π- π+ and Ξc+ → Σ- π+ π+ and measurement of their branching ratios
Creators: C.O Escobar - Universidade de São Paulo
N Estrada - Universidad Autónoma de San Luis Potosí
A.V Evdokimov - Institute of Theoretical and Experimental Physics, Moscow, Russia
I.S Filimonov - Moscow State University
F.G Garcia - Universidade de São Paulo
M Gaspero - Sapienza University of Rome
I Giller - Tel Aviv University
V.L Golovtsov - Petersburg Nuclear Physics Institute
P Gouffon - Universidade de São Paulo
E Gülmez - Boğaziçi University
Kangling He - Institute of High Energy Physics, Beijing, PR China
M Iori - Sapienza University of Rome
S.Y Jun - Carnegie Mellon University
M Kaya - University of Iowa
J Kilmer - Fermi National Accelerator Laboratory
V.T Kim - Petersburg Nuclear Physics Institute
L.M Kochenda - Petersburg Nuclear Physics Institute
I Konorov - Max Planck Society
A.P Kozhevnikov - Institute for High Energy Physics, Protvino, Russia
A.G Krivshich - Petersburg Nuclear Physics Institute
H Krü - Max Planck Society
M.A Kubantsev - Institute of Theoretical and Experimental Physics, Moscow, Russia
V.P Kubarovsky - Institute for High Energy Physics, Protvino, Russia
A.I Kulyavtsev - Fermi National Accelerator Laboratory
N.P Kuropatkin - Petersburg Nuclear Physics Institute
V.F Kurshetsov - Institute for High Energy Physics, Protvino, Russia
A Kushnirenko - Carnegie Mellon University
S Kwan - Fermi National Accelerator Laboratory
J Lach - Fermi National Accelerator Laboratory
A Lamberto - University of Trieste
L.G Landsberg - Institute for High Energy Physics, Protvino, Russia
I Larin - Institute of Theoretical and Experimental Physics, Moscow, Russia
E.M Leikin - Moscow State University
Yunshan Li - Institute of High Energy Physics, Beijing, PR China
G Ló - Universidad Autónoma de San Luis Potosí
M Luksys - Universidade Federal da Paraíba
T Lungov - Universidade de São Paulo
V.P Maleev - Petersburg Nuclear Physics Institute
D Mao - Carnegie Mellon University
Chensheng Mao - Institute of High Energy Physics, Beijing, PR China
Zhenlin Mao - Institute of High Energy Physics, Beijing, PR China
E Vázquez-Jáuregui - Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico
J Engelfried - Universidad Autónoma de San Luis Potosí
P Mathew - Carnegie Mellon University
U Akgun - University of Iowa
M Mattson - Carnegie Mellon University
V Matveev - Institute of Theoretical and Experimental Physics, Moscow, Russia
G Alkhazov - Petersburg Nuclear Physics Institute
E McCliment - University of Iowa
J Amaro-Reyes - Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico
M.A Moinester - Tel Aviv University
A.G Atamantchouk - Petersburg Nuclear Physics Institute
A.S Ayan - University of Iowa
V.V Molchanov - Institute for High Energy Physics, Protvino, Russia
M.Y Balatz - Institute of Theoretical and Experimental Physics, Moscow, Russia
A Morelos - Universidad Autónoma de San Luis Potosí
A Blanco-Covarrubias - Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico
K.D Nelson - University of Iowa
N.F Bondar - Petersburg Nuclear Physics Institute
A.V Nemitkin - Moscow State University
P.S Cooper - Fermi National Accelerator Laboratory
P.V Neoustroev - Petersburg Nuclear Physics Institute
L.J Dauwe - University of Michigan–Flint
C Newsom - University of Iowa
A.P Nilov - Institute of Theoretical and Experimental Physics, Moscow, Russia
G.V Davidenko - Institute of Theoretical and Experimental Physics, Moscow, Russia
U Dersch - Max Planck Society
S.B Nurushev - Institute for High Energy Physics, Protvino, Russia
A.G Dolgolenko - Institute of Theoretical and Experimental Physics, Moscow, Russia
A Ocherashvili - Tel Aviv University
G.B Dzyubenko - Institute of Theoretical and Experimental Physics, Moscow, Russia
Y Onel - University of Iowa
R Edelstein - Carnegie Mellon University
E Ozel - University of Iowa
L Emediato - Universidade de São Paulo
S Ozkorucuklu - University of Iowa
A.M.F Endler - Centro Brasileiro de Pesquisas Físicas
A Penzo - University of Trieste
I Eschrich - Max Planck Society
S.V Petrenko - Institute for High Energy Physics, Protvino, Russia
P Pogodin - University of Iowa
M Procario - Carnegie Mellon University
V.A Prutskoi - Institute of Theoretical and Experimental Physics, Moscow, Russia
E Ramberg - Fermi National Accelerator Laboratory
G.F Rappazzo - University of Trieste
B.V Razmyslovich - Petersburg Nuclear Physics Institute
V.I Rud - Moscow State University
J Russ - Carnegie Mellon University
J.L Sánchez-López - Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico
P Schiavon - University of Trieste
J Simon - Max Planck Society
A.I Sitnikov - Institute of Theoretical and Experimental Physics, Moscow, Russia
D Skow - Fermi National Accelerator Laboratory
V.J Smith - University of Bristol
M Srivastava - Universidade de São Paulo
V Steiner - Tel Aviv University
V Stepanov - Petersburg Nuclear Physics Institute
L Stutte - Fermi National Accelerator Laboratory
M Svoiski - Petersburg Nuclear Physics Institute
N.K Terentyev - Petersburg Nuclear Physics Institute
G.P Thomas - Ball State University
I Torres - Universidad Autónoma de San Luis Potosí
L.N Uvarov - Petersburg Nuclear Physics Institute
A.N Vasiliev - Institute for High Energy Physics, Protvino, Russia
D.V Vavilov - Institute for High Energy Physics, Protvino, Russia
V.S Verebryusov - Institute of Theoretical and Experimental Physics, Moscow, Russia
V.A Victorov - Institute for High Energy Physics, Protvino, Russia
V.E Vishnyakov - Institute of Theoretical and Experimental Physics, Moscow, Russia
A.A Vorobyov - Petersburg Nuclear Physics Institute
K Vorwalter - Max Planck Society
J You - Fermi National Accelerator Laboratory
Wenheng Zhao - Institute of High Energy Physics, Beijing, PR China
Shuchen Zheng - Institute of High Energy Physics, Beijing, PR China
R Zukanovich-Funchal - Universidade de São Paulo
SELEX Collaboration
Resource Type: Journal article
Publication Details: Physics letters. B, Vol.666(4), pp.299-304
DOI: 10.1016/j.physletb.2008.07.072
ISSN: 0370-2693
eISSN: 1873-2445
Publisher: Elsevier B.V
Language: English
Date published: 09/04/2008
Academic Unit: Physics and Astronomy
Record Identifier: 9984199763002771

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