Search for <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>P</mml:mi></mml:mrow><mml:mrow><mml:mi>c</mml:mi><mml:mover accent="true"><mml:mrow><mml:mi>c</mml:mi></mml:mrow><mml:mrow><mml:mo stretchy="false">¯</mml:mo></mml:mrow></mml:mover><mml:mi>s</mml:mi></mml:mrow></mml:msub><mml:mo stretchy="false">(</mml:mo><mml:mn>4459</mml:mn><mml:msup><mml:mrow><mml:mo stretchy="false">)</mml:mo></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>P</mml:mi></mml:mrow><mml:mrow><mml:mi>c</mml:mi><mml:mover accent="true"><mml:mrow><mml:mi>c</mml:mi></mml:mrow><mml:mrow><mml:mo stretchy="false">¯</mml:mo></mml:mrow></mml:mover><mml:mi>s</mml:mi></mml:mrow></mml:msub><mml:mo stretchy="false">(</mml:mo><mml:mn>4338</mml:mn><mml:msup><mml:mrow><mml:mo stretchy="false">)</mml:mo></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math> in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="normal">ϒ</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mn>1</mml:mn><mml:mi>S</mml:mi><mml:mo>,</mml:mo><mml:mn>2</mml:mn><mml:mi>S</mml:mi><mml:mo stretchy="false">)</mml:mo></mml:math> Inclusive Decays at Belle
I. Adachi, L. Aggarwal, H. Ahmed, J. K. Ahn, H. Aihara, Н. Акопов, M. Alhakami, A. Aloisio, N. Althubiti, D. M. Asner, H. Atmacan, V. Aushev, M. Aversano, R. Ayad, V. Babu, H. Bae, N. K. Baghel, S. Bahinipati, P. Bambade, S. Banerjee, S. Bansal, M. Barrett, M. Bartl, J. Baudot, A. Baur, A. Beaubien, F. Becherer, Jürgen Becker, J. V. Bennett, F. U. Bernlochner, V. Bertacchi, M. Bertemes, E. Bertholet, M. Bessner, S. Bettarini, V. Bhardwaj, B. Bhuyan, F. Bianchi, D. Biswas, D. Bodrov, A. E. Bolz, A. Boschetti, A. Bożek, M. Bračko, P. Branchini, R. A. Briere, T. E. Browder, A. Budano, S. Bussino, Q. Campagna, M. Campajola, L. Cao, G. Casarosa, C. Cecchi, J. Cerasoli, M.-C. Chang, P. Chang, R. Cheaib, P. Cheema, B. G. Cheon, K. Chilikin, K. Chirapatpimol, H.-E. Cho, K. Cho, S.-J. Cho, S.-K. Choi, S. Choudhury, J. Cochran, L. Corona, J. X. Cui, E. De La Cruz–Burelo, S. A. De La Motte, G. De Nardo, G. De Pietro, R. de Sangro, M. Destefanis, S. Dey, R. Dhamija, F. Di Capua, J. Dingfelder, Z. Doležal, I. Domínguez Jiménez, T. V. Dong, X. Dong, D. Dossett, K. Dugic, G. Dujany, P. Ecker, J. Eppelt, P. Feichtinger, T. Ferber, T. Fillinger, C. Finck, G. Finocchiaro, F. Forti, B. G. Fulsom, A. Gabrielli, E. Ganiev, M. Garcia-Hernandez, G. Gaudino
Abstract
Using data samples of 102 million ϒ(1S) events and 158 million ϒ(2S) events collected by the Belle detector at the KEKB asymmetric-energy e^{+}e^{-} collider, we search for [udscc[over ¯]] pentaquark states decaying to J/ψΛ. Using the first observations of ϒ(1S,2S) inclusive decays to J/ψΛ, we find evidence of the P_{cc[over ¯]s}(4459)^{0} state with a local significance of 3.3 standard deviations, including statistical and systematic uncertainties. We measure the mass and width of the P_{cc[over ¯]s}(4459)^{0} to be (4471.7±4.8±0.6) MeV/c^{2} and (22±13±3) MeV, respectively. The branching fractions for P_{cc[over ¯]s}(4459)^{0} production are measured to be B[ϒ(1S)→P_{cc[over ¯]s}(4459)^{0}/P[over ¯]_{cc[over ¯]s}(4459)^{0}+anything]=(3.5±2.0±0.2)×10^{-6} and B[ϒ(2S)→P_{cc[over ¯]s}(4459)^{0}/P[over ¯]_{cc[over ¯]s}(4459)^{0}+anything]=(2.9±1.7±0.4)×10^{-6}. The inclusive branching fractions of ϒ(1S,2S)→J/ψΛ/Λ[over ¯] are measured to be B[ϒ(1S)→J/ψΛ/Λ[over ¯]+anything]=(36.9±5.3±2.4)×10^{-6} and B[ϒ(2S)→J/ψΛ/Λ[over ¯]+anything]=(22.3±5.7±3.1)×10^{-6}. We measure the visible cross section σ(e^{+}e^{-}→J/ψΛ/Λ[over ¯]+anything)=(90±14±6) fb for the continuum production at sqrt[s]=10.52 GeV. In all cases, the first uncertainties are statistical and the second are systematic.