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Observation of Xi(1620)(0) and Evidence for Xi(1690)(0) in Xi(+)(c) -> Xi(-) pi(+) pi(+) Decays

Belle Collaboration; Schnell, Gunar; Van Hulse, Charlotte Barbara (American Physical Society, 2019-02-21)

We report the first observation of the double strange baryon Xi(1620)(0) in its decay to Xi(-) pi(+) via Xi(+)(c) -> Xi(-)pi(+)pi(+) decays based on a 980 fb(-1) data sample collected with the Belle detector at the KEKB ...

First Measurements of Absolute Branching Fractions of the Xi(0)(c) Baryon at Belle

Belle Collaboration; Schnell, Gunar (American Physical Society, 2019-02-25)

We present the first measurements of absolute branching fractions of Xi(0)(c) decays into Xi(-)pi(+), Lambda K-pi(+), and pK(-)K(-)pi(+) final states. The measurements are made using a dataset comprising (772 +/- 11) x ...

Search forΩ(2012)→KΞ(1530)→KπΞat Belle

Belle Collaboration; Schnell, Gunar (American Physical Society, 2019-08)

Using data samples of e(+)e(-) collisions collected at the Upsilon(1S), Upsilon(2S), and Upsilon(3S) resonances with the Belle detector, we search for the three-body decay of the Omega(2012) baryon to K pi Xi. This decay ...

Observation of tau(-) -> pi(-)nu(tau)e(+)e(-) and search for tau(-) -> pi(-)nu(tau)mu(+)mu(-)

Belle Collaboration; Schnell, Gunar (American Physical Society, 2019-10-15)

We present the first measurements of branching fractions of rare tau-lepton decays, tau(-) -> pi(-)nu(tau)l(+)l(-) (l = e or mu), using a data sample corresponding to 562 fb(-1) collected at a center-of-mass energy of 10.58 ...

Observation of Υ(4S) → η1 Υ (1S)

Guido, E.; Mussa, R.; Tamponi, U.; Aihara, H.; Al Said, S.; Asner, D. M.; Atmacan, H.; Aulchenko, V.; Aushev, T.; Ayad, R.; Babu, V.; Badhrees, I.; Bakich, A. M.; Bansal, V.; Behera, P.; Berger, M.; Bhardwaj, V.; Biswal, J.; Bondar, A.; Bonvicini, G.; Bozek, A.; Bračko, M.; Browder, T. E.; Červenkov, D.; Chekelian, V.; Chen, A.; Cheon, B. G.; Chilikin, K.; Cho, K.; Choi, S. K.; Choi, Y.; Choudhury, S.; Cinabro, D.; Cunliffe, S.; Di Carlo, S.; Doležal, Z.; Eidelman, S.; Epifanov, D.; Fast, J. E.; Ferber, T.; Fulsom, B. G.; Garg, R.; Gaur, V.; Gabyshev, N.; Garmash, A.; Gelb, M.; Giri, A.; Goldenzweig, P.; Haba, J.; Hara, T.; Hayashii, H.; Hedges, M. T.; Hou, W.-S.; Inami, K.; Inguglia, G.; Ishikawa, A.; Itoh, R.; Iwasaki, M.; Iwasaki, Y.; Jacobs, W. W.; Jeon, H. B.; Jia, S.; Jin, Y.; Julius, T.; Kang, K. H.; Karyan, G.; Kawasaki, T.; Kiesling, C.; Kim, D. Y.; Kim, J. B.; Kim, K. T.; Kim, S. H.; Kinoshita, K.; Kodyš, P.; Korpar, S.; Kotchetkov, D.; Križan, P.; Kroeger, R.; Krokovny, P.; Kulasiri, R.; Kumar, R.; Kumita, T.; Kuzmin, A.; Kwon, Y.-J.; Lee, I. S.; Lee, S. C.; Li, L. K.; Li, Y. B.; Gioi, L. Li; Libby, J.; Liventsev, D.; Lubej, M.; Luo, T.; MacNaughton, J.; Masuda, M.; Matsuda, T.; Matvienko, D.; Merola, M.; Miyabayashi, K.; Miyata, H.; Mizuk, R.; Mohanty, G. B.; Moon, H. K.; Mori, T.; Nakano, E.; Nakao, M.; Nanut, T.; Nath, K. J.; Nayak, M.; Niiyama, M.; Nishida, S.; Ogawa, S.; Ono, H.; Ostrowicz, W.; Pakhlova, G.; Pal, B.; Pardi, S.; Park, C. W.; Paul, S.; Pedlar, T. K.; Pestotnik, R.; Piilonen, L. E.; Popov, V.; Rostomyan, A.; Russo, G.; Sakai, Y.; Salehi, M.; Sanuki, T.; Schneider, O.; Schnell, Gunar; Schwanda, C.; Seino, Y.; Shebalin, V.; Shen, C. P.; Shibata, T. A.; Shiu, J.-G.; Shwartz, B.; Sokolov, A.; Starič, M.; Strube, J. F.; Sumihama, M.; Sumiyoshi, T.; Takizawa, M.; Tanida, K.; Tenchini, F.; Uchida, M.; Uglov, T.; Unno, Y.; Usov, Y.; Van Hulse, Charlotte Barbara; Varner, G.; Vinokurova, A.; Wang, B.; Wang, C. H.; Wang, M. -Z.; Wang, P.; Wang, X. L.; Watanabe, M.; Watanabe, Y.; Widmann, E.; Won, E.; Ye, H.; Yelton, J.; Yuan, C. Z.; Yusa, Y.; Zakharov, S.; Zhang, Z. P.; Zhilich, V.; Zhukova Zhukova, Valentina; Zhulanov, V. (American Physical Society, 2018-08-06)

We report the first observation of the hadronic transition Upsilon(4S) -> eta'Upsilon(1S), using 496 fb(-1) data collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. ...

Measurements of Isospin Asymmetry and Difference of Direct CP Asymmetries in Inclusive B→Xsγ Decays

Belle Collaboration; Schnell, Gunar; Van Hulse, Charlotte Barbara (American Physical Society, 2019-02-20)

We report measurements of isospin asymmetry Delta(0-) and difference of direct CP asymmetries Delta A(CP) between charged and neutral B -> X-s gamma decays. This analysis is based on the data sample containing 772 x 10(6)B ...

Observation of an Excited Omega(-) Baryon

Belle Collaboration; Schnell, Gunar; Van Hulse, Charlotte Barbara (American Physical Society, 2018-08-02)

Using data recorded with the Belle detector, we observe a new excited hyperon, an Omega*(-) candidate decaying into Xi K-0(-) and Xi K--(S)0 with a mass of 2012.4 +/- 0.7(stat) +/- 0.6(syst) McV/c(2) and a width of Gamma ...

Observation of TransverseΛ= ̄ΛHyperon Polarization ine+e−Annihilation at Belle

Belle Collaboration; Schnell, Gunar; Van Hulse, Charlotte Barbara (American Physical Society, 2019-01-29)

We report the first observation of the spontaneous polarization of Lambda and (Lambda) over bar hyperons transverse to the production plane in e(+)e(-) annihilation, which is attributed to the effect arising from a polarizing ...

Observation of τ−→π−ντe+e− and search for τ−→π−ντμ+μ−

Belle Collaboration; Schnell, Gunar (American Physical Society, 2019)

Search for B-0 -> X(3872)gamma

Belle Collaboration; Schnell, Gunar (American Physical Society, 2019-07-19)

We report the results of a search for the decay B-0 -> X(3872) (-> J/psi pi(+)pi(-))gamma. The analysis is performed on a data sample corresponding to an integrated luminosity of 711 fb(-1) and containing 772 x 10(6)B (B) ...