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Evidence of a structure in $$\bar{K}^{0} \Lambda _{c}^{+}$$ K¯0Λc+ consistent with a charged $$\Xi _c(2930)^{+}$$ Ξc(2930)+ , and updated measurement of $$\bar{B}^{0} \rightarrow \bar{K}^{0} \Lambda _{c}^{+} \bar{\Lambda }_{c}^{-}$$ B¯0→K¯0Λc+Λ¯c- at Belle

European Physical Journal C: Particles and Fields. 2018;78(11):1-8 DOI 10.1140/epjc/s10052-018-6425-5

 

Journal Homepage

Journal Title: European Physical Journal C: Particles and Fields

ISSN: 1434-6044 (Print); 1434-6052 (Online)

Publisher: SpringerOpen

Society/Institution: Societa Italiana di Fisica (SIF); Societe Francaise de Physique (SFP)

LCC Subject Category: Science: Astronomy: Astrophysics | Science: Physics: Nuclear and particle physics. Atomic energy. Radioactivity

Country of publisher: Germany

Language of fulltext: English

Full-text formats available: PDF, HTML

 

AUTHORS


Y. B. Li (Peking University)

C. P. Shen (Beihang University)

I. Adachi (SOKENDAI (The Graduate University for Advanced Studies))

H. Aihara (Department of Physics, University of Tokyo)

S. Al Said (Department of Physics, Faculty of Science, King Abdulaziz University)

D. M. Asner (Brookhaven National Laboratory)

T. Aushev (Moscow Institute of Physics and Technology)

R. Ayad (Department of Physics, Faculty of Science, University of Tabuk)

V. Babu (Tata Institute of Fundamental Research)

I. Badhrees (King Abdulaziz City for Science and Technology)

S. Bahinipati (Indian Institute of Technology Bhubaneswar)

Y. Ban (Peking University)

V. Bansal (Pacific Northwest National Laboratory)

P. Behera (Indian Institute of Technology Madras)

C. Beleño (II. Physikalisches Institut, Georg-August-Universität Göttingen)

V. Bhardwaj (Indian Institute of Science Education and Research Mohali)

B. Bhuyan (Indian Institute of Technology Guwahati)

J. Biswal (J. Stefan Institute)

A. Bobrov (Budker Institute of Nuclear Physics SB RAS)

A. Bozek (H. Niewodniczanski Institute of Nuclear Physics)

M. Bračko (J. Stefan Institute)

T. E. Browder (University of Hawaii)

L. Cao (Institut für Experimentelle Kernphysik, Karlsruher Institut für Technologie)

D. Červenkov (Faculty of Mathematics and Physics, Charles University)

P. Chang (Department of Physics, National Taiwan University)

V. Chekelian (Max-Planck-Institut für Physik)

A. Chen (National Central University)

B. G. Cheon (Hanyang University)

K. Chilikin (P.N. Lebedev Physical Institute of the Russian Academy of Sciences)

K. Cho (Korea Institute of Science and Technology Information)

S.-K. Choi (Gyeongsang National University)

Y. Choi (Sungkyunkwan University)

S. Choudhury (Indian Institute of Technology Hyderabad)

D. Cinabro (Wayne State University)

S. Cunliffe (Deutsches Elektronen-Synchrotron)

N. Dash (Indian Institute of Technology Bhubaneswar)

S. Di Carlo (LAL, Univ. Paris-Sud, CNRS/IN2P3, Université Paris-Saclay)

J. Dingfelder (University of Bonn)

Z. Doležal (Faculty of Mathematics and Physics, Charles University)

T. V. Dong (SOKENDAI (The Graduate University for Advanced Studies))

Z. Drásal (Faculty of Mathematics and Physics, Charles University)

S. Eidelman (Budker Institute of Nuclear Physics SB RAS)

D. Epifanov (Budker Institute of Nuclear Physics SB RAS)

J. E. Fast (Pacific Northwest National Laboratory)

B. G. Fulsom (Pacific Northwest National Laboratory)

R. Garg (Panjab University)

V. Gaur (Virginia Polytechnic Institute and State University)

N. Gabyshev (Budker Institute of Nuclear Physics SB RAS)

A. Garmash (Budker Institute of Nuclear Physics SB RAS)

M. Gelb (Institut für Experimentelle Kernphysik, Karlsruher Institut für Technologie)

A. Giri (Indian Institute of Technology Hyderabad)

P. Goldenzweig (Institut für Experimentelle Kernphysik, Karlsruher Institut für Technologie)

B. Golob (J. Stefan Institute)

J. Haba (SOKENDAI (The Graduate University for Advanced Studies))

K. Hayasaka (Niigata University)

S. Hirose (Graduate School of Science, Nagoya University)

W.-S. Hou (Department of Physics, National Taiwan University)

T. Iijima (Graduate School of Science, Nagoya University)

K. Inami (Graduate School of Science, Nagoya University)

G. Inguglia (Deutsches Elektronen-Synchrotron)

A. Ishikawa (Department of Physics, Tohoku University)

R. Itoh (SOKENDAI (The Graduate University for Advanced Studies))

M. Iwasaki (Osaka City University)

Y. Iwasaki (High Energy Accelerator Research Organization (KEK))

W. W. Jacobs (Indiana University)

I. Jaegle (University of Florida)

H. B. Jeon (Kyungpook National University)

S. Jia (Beihang University)

Y. Jin (Department of Physics, University of Tokyo)

K. K. Joo (Chonnam National University)

A. B. Kaliyar (Indian Institute of Technology Madras)

K. H. Kang (Kyungpook National University)

Y. Kato (Graduate School of Science, Nagoya University)

T. Kawasaki (Niigata University)

D. Y. Kim (Soongsil University)

J. B. Kim (Korea University)

S. H. Kim (Hanyang University)

K. Kinoshita (University of Cincinnati)

P. Kodyš (Faculty of Mathematics and Physics, Charles University)

S. Korpar (J. Stefan Institute)

D. Kotchetkov (University of Hawaii)

P. Križan (J. Stefan Institute)

R. Kroeger (University of Mississippi)

P. Krokovny (Budker Institute of Nuclear Physics SB RAS)

T. Kuhr (Ludwig Maximilians University)

Y.-J. Kwon (Yonsei University)

J. S. Lange (Justus-Liebig-Universität Gießen)

I. S. Lee (Hanyang University)

S. C. Lee (Kyungpook National University)

L. K. Li (Institute of High Energy Physics, Chinese Academy of Sciences)

L. Li Gioi (Max-Planck-Institut für Physik)

J. Libby (Indian Institute of Technology Madras)

D. Liventsev (High Energy Accelerator Research Organization (KEK))

T. Luo (Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) and Institute of Modern Physics, Fudan University)

D. Matvienko (Budker Institute of Nuclear Physics SB RAS)

M. Merola (INFN-Sezione di Napoli)

H. Miyata (Niigata University)

R. Mizuk (P.N. Lebedev Physical Institute of the Russian Academy of Sciences)

H. K. Moon (Korea University)

T. Mori (Graduate School of Science, Nagoya University)

R. Mussa (INFN-Sezione di Torino)

E. Nakano (Osaka City University)

T. Nanut (J. Stefan Institute)

K. J. Nath (Indian Institute of Technology Guwahati)

Z. Natkaniec (H. Niewodniczanski Institute of Nuclear Physics)

M. Nayak (High Energy Accelerator Research Organization (KEK))

N. K. Nisar (University of Pittsburgh)

S. Nishida (SOKENDAI (The Graduate University for Advanced Studies))

K. Nishimura (University of Hawaii)

K. Ogawa (Niigata University)

S. Okuno (Kanagawa University)

H. Ono (Nippon Dental University)

P. Pakhlov (P.N. Lebedev Physical Institute of the Russian Academy of Sciences)

G. Pakhlova (P.N. Lebedev Physical Institute of the Russian Academy of Sciences)

B. Pal (Brookhaven National Laboratory)

S. Pardi (INFN-Sezione di Napoli)

H. Park (Kyungpook National University)

S. Paul (Department of Physics, Technische Universität München)

T. K. Pedlar (Luther College)

R. Pestotnik (J. Stefan Institute)

L. E. Piilonen (Virginia Polytechnic Institute and State University)

V. Popov (P.N. Lebedev Physical Institute of the Russian Academy of Sciences)

E. Prencipe (Forschungszentrum Jülich)

A. Rostomyan (Deutsches Elektronen-Synchrotron)

G. Russo (INFN-Sezione di Napoli)

Y. Sakai (SOKENDAI (The Graduate University for Advanced Studies))

M. Salehi (Ludwig Maximilians University)

S. Sandilya (University of Cincinnati)

L. Santelj (High Energy Accelerator Research Organization (KEK))

T. Sanuki (Department of Physics, Tohoku University)

V. Savinov (University of Pittsburgh)

O. Schneider (École Polytechnique Fédérale de Lausanne (EPFL))

G. Schnell (University of the Basque Country UPV/EHU)

C. Schwanda (Institute of High Energy Physics)

Y. Seino (Niigata University)

K. Senyo (Yamagata University)

O. Seon (Graduate School of Science, Nagoya University)

M. E. Sevior (School of Physics, University of Melbourne)

T.-A. Shibata (Tokyo Institute of Technology)

J.-G. Shiu (Department of Physics, National Taiwan University)

E. Solovieva (P.N. Lebedev Physical Institute of the Russian Academy of Sciences)

M. Starič (J. Stefan Institute)

J. F. Strube (Pacific Northwest National Laboratory)

M. Sumihama (Gifu University)

T. Sumiyoshi (Tokyo Metropolitan University)

M. Takizawa (J-PARC Branch, KEK Theory Center, High Energy Accelerator Research Organization (KEK))

U. Tamponi (INFN-Sezione di Torino)

K. Tanida (Advanced Science Research Center, Japan Atomic Energy Agency)

F. Tenchini (School of Physics, University of Melbourne)

M. Uchida (Tokyo Institute of Technology)

T. Uglov (P.N. Lebedev Physical Institute of the Russian Academy of Sciences)

Y. Unno (Hanyang University)

S. Uno (SOKENDAI (The Graduate University for Advanced Studies))

Y. Usov (Budker Institute of Nuclear Physics SB RAS)

C. Van Hulse (University of the Basque Country UPV/EHU)

R. Van Tonder (Institut für Experimentelle Kernphysik, Karlsruher Institut für Technologie)

G. Varner (University of Hawaii)

K. E. Varvell (School of Physics, University of Sydney)

V. Vorobyev (Budker Institute of Nuclear Physics SB RAS)

E. Waheed (School of Physics, University of Melbourne)

B. Wang (University of Cincinnati)

C. H. Wang (National United University)

M.-Z. Wang (Department of Physics, National Taiwan University)

P. Wang (Institute of High Energy Physics, Chinese Academy of Sciences)

X. L. Wang (Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) and Institute of Modern Physics, Fudan University)

S. Watanuki (Department of Physics, Tohoku University)

E. Widmann (Stefan Meyer Institute for Subatomic Physics)

E. Won (Korea University)

H. Ye (Deutsches Elektronen-Synchrotron)

J. Yelton (University of Florida)

J. H. Yin (Institute of High Energy Physics, Chinese Academy of Sciences)

C. Z. Yuan (Institute of High Energy Physics, Chinese Academy of Sciences)

Y. Yusa (Niigata University)

Z. P. Zhang (University of Science and Technology of China)

V. Zhilich (Budker Institute of Nuclear Physics SB RAS)

V. Zhukova (P.N. Lebedev Physical Institute of the Russian Academy of Sciences)

V. Zhulanov (Budker Institute of Nuclear Physics SB RAS)

EDITORIAL INFORMATION

Blind peer review

Editorial Board

Instructions for authors

Time From Submission to Publication: 12 weeks

 

Abstract | Full Text

Abstract We report evidence for the charged charmed-strange baryon $$\Xi _{c}(2930)^+$$ Ξc(2930)+ with a signal significance of 3.9$$\sigma $$ σ with systematic errors included. The charged $$\Xi _{c}(2930)^+$$ Ξc(2930)+ is found in its decay to $$K_{S}^{0} \Lambda _{c}^+$$ KS0Λc+ in the substructure of $$\bar{B}^{0} \rightarrow K^{0}_{S} \Lambda _{c}^{+} \bar{\Lambda }_{c}^{-}$$ B¯0→KS0Λc+Λ¯c- decays. The measured mass and width are $$[2942.3 \pm 4.4 ({\mathrm{stat.}}) \pm {1.5}({\mathrm{syst.}})]$$ [2942.3±4.4(stat.)±1.5(syst.)]  MeV/$$c^{2}$$ c2 and $$[14.8 \pm 8.8({\mathrm{stat.}}) \pm {2.5}({\mathrm{syst.}})]$$ [14.8±8.8(stat.)±2.5(syst.)]  MeV, respectively, and the product branching fraction is $$\mathcal{B}(\bar{B}^{0} \rightarrow \Xi _c(2930)^{+} \bar{\Lambda }_{c}^{-}) \mathcal{B}(\Xi _c(2930)^{+}\rightarrow \bar{K}^{0} \Lambda _{c}^{+})=[2.37 \pm 0.51 ({\mathrm{stat.}})\pm 0.31({\mathrm{syst.}})]\times 10^{-4}$$ B(B¯0→Ξc(2930)+Λ¯c-)B(Ξc(2930)+→K¯0Λc+)=[2.37±0.51(stat.)±0.31(syst.)]×10-4 . We also measure $$\mathcal{B}(\bar{B}^{0} \rightarrow \bar{K}^{0} \Lambda _{c}^{+} \bar{\Lambda }_{c}^{-}) = [3.99 \pm 0.76({\mathrm{stat.}}) \pm 0.51({\mathrm{syst.}})] \times 10^{-4}$$ B(B¯0→K¯0Λc+Λ¯c-)=[3.99±0.76(stat.)±0.51(syst.)]×10-4 with greater precision than previous experiments, and present the results of a search for the charmonium-like state Y(4660) and its spin partner, $$Y_{\eta }$$ Yη , in the $$\Lambda _{c}^{+}\bar{\Lambda }_{c}^{-}$$ Λc+Λ¯c- invariant mass spectrum. No clear signals of the Y(4660) or $$Y_{\eta }$$ Yη are observed and the 90% credibility level (C.L.) upper limits on their production rates are determined. These measurements are obtained from a sample of $$(772\pm 11)\times 10^{6} B\bar{B}$$ (772±11)×106BB¯ pairs collected at the $$\Upsilon (4S)$$ Υ(4S) resonance by the Belle detector at the KEKB asymmetric energy electron-positron collider.