First observation of $\gamma \gamma \to p\overline{p}{K}^{+}{K}^{-}$ and search for exotic baryons in $pK$ systems

Journal Article · Thu Jun 30 00:00:00 EDT 2016 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.93.112017· OSTI ID:1594386

Shen, C. P.; Yuan, C. Z.; Adachi, I.; Aihara, H.; Asner, D. M.; Aulchenko, V.; Aushev, T.; Ayad, R.; Babu, V.; Badhrees, I.; Bakich, A. M.; Barberio, E.; Behera, P.; Bhardwaj, V.; Bhuyan, B.; Biswal, J.; Bobrov, A.; Bonvicini, G.; Bozek, A.; Bračko, M. ; Browder, T. E.; Červenkov, D.; Chang, P.; Chekelian, V.; Chen, A.; Cheon, B. G.; Chilikin, K.; Chistov, R.; Cho, K.; Chobanova, V.; Choi, S. -K.; Choi, Y.; Cinabro, D.; Dalseno, J.; Danilov, M.; Dash, N.; Doležal, Z.; Drásal, Z.; Dutta, D.; Eidelman, S.; Fang, W. X.; Fast, J. E.; Ferber, T.; Fulsom, B. G.; Gaur, V.; Gabyshev, N.; Garmash, A.; Gillard, R.; Glattauer, R.; Goldenzweig, P.; Grzymkowska, O.; Haba, J.; Hayasaka, K.; Hayashii, H.; Hou, W. -S.; Iijima, T.; Inami, K.; Inguglia, G.; Ishikawa, A.; Itoh, R.; Iwasaki, Y.; Jaegle, I.; Jeon, H. B.; Joo, K. K.; Julius, T.; Kang, K. H.; Kato, E.; Kiesling, C.; Kim, D. Y.; Kim, J. B.; Kim, K. T.; Kim, S. H.; Kim, Y. J.; Kodyš, P.; Korpar, S.; Kotchetkov, D.; Križan, P.; Krokovny, P.; Kuzmin, A.; Kwon, Y. -J.; Lange, J. S.; Li, C. H.; Li, H.; Li, L.; Li, Y.; Li Gioi, L.; Libby, J.; Liventsev, D.; Lubej, M.; Luo, T.; Masuda, M.; Matsuda, T.; Matvienko, D.; Miyabayashi, K.; Miyata, H.; Mizuk, R.; Mohanty, G. B.; Mohanty, S.; Moll, A.; Moon, H. K.; Mussa, R.; Nakano, E.; Nakao, M.; Nanut, T.; Nath, K. J.; Natkaniec, Z.; Nishida, S.; Ogawa, S.; Olsen, S. L.; Ostrowicz, W.; Pakhlov, P.; Pakhlova, G.; Pal, B.; Park, C. -S.; Park, H.; Pesántez, L.; Pestotnik, R.; Petrič, M.; Piilonen, L. E.; Pulvermacher, C.; Rauch, J.; Ritter, M.; Sakai, Y.; Sandilya, S.; Santelj, L.; Sanuki, T.; Savinov, V.; Schlüter, T.; Schneider, O.; Schnell, G.; Schwanda, C.; Seino, Y.; Semmler, D.; Senyo, K.; Seong, I. S.; Sevior, M. E.; Shibata, T. -A.; Shiu, J. -G.; Shwartz, B.; Simon, F.; Sokolov, A.; Solovieva, E.; Stanič, S.; Starič, M.; Strube, J. F.; Stypula, J.; Sumihama, M.; Sumiyoshi, T.; Takizawa, M.; Tamponi, U.; Tanida, K.; Tenchini, F.; Trabelsi, K.; Uchida, M.; Uehara, S.; Uglov, T.; Unno, Y.; Uno, S.; Urquijo, P.; Usov, Y.; Van Hulse, C.; Varner, G.; Wang, C. H.; Wang, M. -Z.; Wang, P.; Watanabe, M.; Watanabe, Y.; Williams, K. M.; Won, E.; Yamaoka, J.; Yelton, J.; Yook, Y.; Yusa, Y.; Zhang, C. C.; Zhang, Z. P.; Zhilich, V.; Zhukova, V.; Zhulanov, V.; Zupanc, A.

The process $\gamma \gamma \to p\overline{p}{K}^{+}{K}^{-}$ and its intermediate processes are measured for the first time using a $980{\mathrm{fb}}^{-1}$ data sample collected with the Belle detector at the KEKB asymmetric-energy $e^{+}{e}^{-}$ collider. The production of $p\overline{p}{K}^{+}{K}^{-}$ and a $\mathrm{\Lambda }(1520{)}^0$ $\left(\overline{\mathrm{\Lambda }}\right(1520{)}^0)$ signal in the $p{K}^{-}$ ( $\overline{p}{K}^{+}$) invariant mass spectrum are clearly observed. However, no evidence for an exotic baryon near $1540\mathrm{MeV}/c^2$, denoted as $\mathrm{\Theta }(1540{)}^0$ ( $\overline{\mathrm{\Theta }}(1540{)}^0$) or $\mathrm{\Theta }(1540{)}^{++}$ ( $\mathrm{\Theta }(1540{)}^{---}$), is seen in the $p{K}^{-}$ ( $\overline{p}{K}^{+}$) or $p{K}^{+}$ ( $\overline{p}{K}^{-}$) invariant mass spectra. Cross sections for $\gamma \gamma \to p\overline{p}{K}^{+}{K}^{-}$, $\mathrm{\Lambda }(1520{)}^0\overline{p}{K}^{+}+\mathrm{c}.\mathrm{c}.$ and the products $\sigma (\gamma \gamma \to \mathrm{\Theta }(1540{)}^0\overline{p}{K}^{+}+\mathrm{c}.\mathrm{c}.\left)\mathcal{B}\right(\mathrm{\Theta }(1540{)}^0\to p{K}^{-})$ and $\sigma (\gamma \gamma \to \mathrm{\Theta }(1540{)}^{++}\overline{p}{K}^{-}+\mathrm{c}.\mathrm{c}.\left)\mathcal{B}\right(\mathrm{\Theta }(1540{)}^{++}\to p{K}^{+})$ are measured. We also determine upper limits on the products of the ${\chi }_{c0}$ and ${\chi }_{c2}$ two-photon decay widths and their branching fractions to $p\overline{p}{K}^{+}{K}^{-}$ at the 90% credibility level.

• Research Organization: Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• Contributing Organization: Belle Collaboration
• Grant/Contract Number: SC0009973
• OSTI ID: 1594386
• Alternate ID(s): OSTI ID: 1259997
• Report Number(s): PNNL-SA-120220; PRVDAQ; TRN: US2101470
• Journal Information: Physical Review D, Vol. 93, Issue 11; ISSN 2470-0010
• Publisher: American Physical Society (APS)
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS