Dalitz analysis of D-0 -> K- pi(+)eta decays at Belle

Chen, Y. Q.; Li, L. K.; Yan, W. B.; Adachi, I.; Aihara, H.; Al Said, S.; Asner, D. M.; Atmacan, H.; Aulchenko, V.; Aushev, T.; Ayad, R.; Babu, V.; Badhrees, I.; Bahinipati, S.; Behera, P.; Bennett, J.; Bhardwaj, V.; Bilka, T.; Biswal, J.; Bozek, A.; Bracko, M.; Browder, T. E.; Campajola, M.; Cao, L.; Cervenkov, D.; Chang, M.-C.; Chekelian, V.; Chen, A.; Cheon, B. G.; Chilikin, K.; Cho, H. E.; Cho, K.; Choi, S.-K.; Choi, Y.; Choudhury, S.; Cinabro, D.; Cunliffe, S.; Dash, N.; De Nardo, G.; Di Capua, F.; Dolezal, Z.; Dong, T. V.; Eidelman, S.; Epifanov, D.; Fast, J. E.; Ferber, T.; Ferlewicz, D.; Fulsom, B. G.; Garg, R.; Gaur, V; Gabyshev, N.; Garmash, A.; Giri, A.; Goldenzweig, P.; Golob, B.; Guan, Y.; Hartbrich, O.; Hayasaka, K.; Hayashii, H.; Hou, W.-S.; Hsu, C.-L.; Inami, K.; Inguglia, G.; Ishikawa, A.; Itoh, R.; Iwasaki, M.; Iwasaki, Y.; Jacobs, W. W.; Jang, E.-J.; Jeon, H. B.; Jia, S.; Jin, Y.; Joo, K. K.; Kang, K. H.; Karyan, G.; Kawasaki, T.; Kim, D. Y.; Kim, S. H.; Kimmel, T. D.; Kinoshita, K.; Kodys, P.; Korpar, S.; Krizan, P.; Kroeger, R.; Krokovny, P.; Kuhr, T.; Kulasiri, R.; Kumar, R.; Kuzmin, A.; Kwon, Y.-J.; Lalwani, K.; Lange, J. S.; Lee, I. S.; Lee, S. C.; Li, Y. B.; Li Gioi, L.; Libby, J.; Lieret, K.; Liventsev, D.; MacNaughton, J.; MacQueen, C.; Masuda, M.; Matvienko, D.; Merola, M.; Miyabayashi, K.; Mizuk, R.; Mohanty, S.; Mrvar, M.; Mussa, R.; Nakao, M.; Natkaniec, Z.; Nayak, M.; Nishida, S.; Ogawa, S.; Ono, H.; Oskin, P.; Pakhlov, P.; Pakhlova, G.; Pardi, S.; Park, H.; Patra, S.; Paul, S.; Pedlar, T. K.; Pestotnik, R.; Piilonen, L. E.; Podobnik, T.; Popov, V.; Prencipe, E.; Prim, M. T.; Rabusov, A.; Ritter, M.; Rohrken, M.; Rout, N.; Russo, G.; Sahoo, D.; Sakai, Y.; Sanuki, T.; Savinov, V.; Schneider, O.; Schnell, G.; Schueler, J.; Schwanda, C.; Schwartz, A. J.; Seino, Y.; Senyo, K.; Sevior, M. E.; Shapkin, M.; Shebalin, V.; Shiu, J-G; Sokolov, A.; Solovieva, E.; Staric, M.; Stottler, Z. S.; Sumihama, M.; Sumiyoshi, T.; Sutcliffe, W.; Takizawa, M.; Tanida, K.; Tenchini, F.; Trabelsi, K.; Uchida, M.; Uglov, T.; Uno, S.; Urquijo, P.; Varner, G.; Vorobyev, V.; Waheed, E.; Wang, C. H.; Wang, E.; Wang, M.-Z.; Wang, P.; Watanabe, M.; Won, E.; Xu, X.; Yang, S. B.; Ye, H.; Yin, J. H.; Yuan, C. Z.; Yusa, Y.; Zhang, Z. P.; Zhilich, V.; Zhukova, V.; Zhulanov, V. (2020): Dalitz analysis of D-0 -> K- pi(+)eta decays at Belle. In: Physical Review D, Vol. 102, No. 1, 012002

Abstract

We present the results of the first Dalitz plot analysis of the decay D-0 -> K-pi(+)eta. The analysis is performed on a data set corresponding to an integrated luminosity of 953 fb(-1) collected by the Belle detector at the asymmetric-energy e(+)e(-) KEKB collider. The Dalitz plot is well described by a combination of the six resonant decay channels (K) over bar*(892)(0)eta, K(-)a(0)(980)(+), K(-)a(2)(1320)+, K(-)a(2)(1410)(0)eta, K*(1680)(-)pi(+) and K-2*(1980)(-)pi(+), together with K pi and eta K eta S-wave components. The decays K* (1680)(-)-> K-eta and K-2* (1980)--> K-eta are observed for the first time. We measure ratio of the branching fractions, B(D-0 -> K-pi(+)eta)/B(D-0 -> K-pi(+)) = 0.500 +/- 0.002(stat) +/- 0.020(syst) +/- 0.003(B-PDG). Using the Dalitz fit result, the ratio B(K*(1680)-> K eta)/B(K*(1680)-> K pi) is measured to be 0.11 +/- 0.002(stat)(-0.04)(+0.06)(syst) +/- 0.04(B-PDG);this is much lower than the theoretical expectations (approximate to 1) made under the assumption that K*(1680) is a pure 1(3)D(1) state. The product branching fraction B(D-0 -> [K-2*(1980)- -> K-eta]pi(+)) = (2.2-1.9+1.7) x 10(-4) is determined. In addition, the pi eta' contribution to the a(0)(980)(+/-) resonance shape is confirmed with 10.1 sigma statistical significance using the three-channel Flatte model. We also measure B(D-0 -> (K) over bar*(892)(0)eta) = (1.41(-0.12)(+0.13))%. This is consistant with, and more precise than, the current world average (1.02 +/- 0.30)%, deviates with a significance of more than 3 sigma from the theoretical predictions of (0.51-0.92)%.

• Item Type: Journal article
• Faculties: Physics
• Subjects: 500 Science > 530 Physics
• ISSN: 1550-7998
• Language: English