Zobrazeno 1 - 10
of 423
pro vyhledávání: '"C. Hanhart"'
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 6, Pp 1-17 (2024)
Abstract Resonances are uniquely characterized by their complex pole locations and the corresponding residues. In practice, however, resonances are typically identified experimentally as structures in invariant mass distributions, with branching frac
Externí odkaz:
https://doaj.org/article/c121df6ad1d946309bf2a8a1f282ffed
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 11, Pp 1-15 (2021)
Abstract We argue that high-quality data on the reaction $$e^+e^-\rightarrow \pi ^+\pi ^-\eta $$ e + e - → π + π - η will allow one to determine the doubly-virtual form factor $$\eta \rightarrow \gamma ^*\gamma ^*$$ η → γ ∗ γ ∗ in a mod
Externí odkaz:
https://doaj.org/article/c24d9c98afcc46729854564dcf026a6e
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 5, Pp 1-17 (2021)
Abstract Pion–kaon ( $$\pi K$$ π K ) pairs occur frequently as final states in heavy-particle decays. A consistent treatment of $$\pi K$$ π K scattering and production amplitudes over a wide energy range is therefore mandatory for multiple applic
Externí odkaz:
https://doaj.org/article/4785d74bdc824f5b8ebe124c76767eef
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 79, Iss 1, Pp 1-7 (2019)
Abstract The possibility for a common effective field theory for hadronic molecules with different heavy-quark flavours is examined critically. It is argued that such a theory does not allow one to draw definite conclusions for doubly heavy molecules
Externí odkaz:
https://doaj.org/article/1a6223768eb84b7bad27a0b77c04bb2d
Autor:
P. Adlarson, W. Augustyniak, W. Bardan, M. Bashkanov, F.S. Bergmann, M. Berłowski, A. Bondar, M. Büscher, H. Calén, I. Ciepał, H. Clement, E. Czerwiński, K. Demmich, R. Engels, A. Erven, W. Erven, W. Eyrich, P. Fedorets, K. Föhl, K. Fransson, F. Goldenbaum, A. Goswami, K. Grigoryev, C.-O. Gullström, C. Hanhart, L. Heijkenskjöld, V. Hejny, N. Hüsken, L. Jarczyk, T. Johansson, B. Kamys, G. Kemmerling, G. Khatri, A. Khoukaz, O. Khreptak, D.A. Kirillov, S. Kistryn, H. Kleines, B. Kłos, W. Krzemień, P. Kulessa, A. Kupść, A. Kuzmin, K. Lalwani, D. Lersch, B. Lorentz, A. Magiera, R. Maier, P. Marciniewski, B. Mariański, H.-P. Morsch, P. Moskal, H. Ohm, W. Parol, E. Perez del Rio, N.M. Piskunov, D. Prasuhn, D. Pszczel, K. Pysz, A. Pyszniak, J. Ritman, A. Roy, Z. Rudy, O. Rundel, S. Sawant, S. Schadmand, I. Schätti-Ozerianska, T. Sefzick, V. Serdyuk, B. Shwartz, K. Sitterberg, T. Skorodko, M. Skurzok, J. Smyrski, V. Sopov, R. Stassen, J. Stepaniak, E. Stephan, G. Sterzenbach, H. Stockhorst, H. Ströher, A. Szczurek, A. Trzciński, M. Wolke, A. Wrońska, P. Wüstner, A. Yamamoto, J. Zabierowski, M.J. Zieliński, J. Złomańczuk, P. Żuprański, M. Żurek
Publikováno v:
Physics Letters B, Vol 781, Iss , Pp 645-650 (2018)
This letter reports a first quantitative analysis of the contribution of higher partial waves in the charge symmetry breaking reaction dd→4Heπ0 using the WASA-at-COSY detector setup at an excess energy of Q=60MeV. The determined differential cross
Externí odkaz:
https://doaj.org/article/0d1de6644f5941349b475bbdfce903b0
Publikováno v:
Journal of High Energy Physics, Vol 2017, Iss 6, Pp 1-23 (2017)
Abstract It has been proposed recently (Phys. Rev. Lett. 115 (2015) 022001) that the charmoniumlike state named X(3915) and suggested to be a 0++ scalar, is just the helicity-0 realisation of the 2++ tensor state χ c2(3930). This scenario would call
Externí odkaz:
https://doaj.org/article/a8a13cb97d5144ec85d4e877d62812b8
Publikováno v:
Journal of High Energy Physics, Vol 2017, Iss 6, Pp 1-22 (2017)
Abstract We study the implications of the heavy-quark spin symmetry for the possible spin partners of the exotic states Z b (10610) and Z b (10650) in the spectrum of bottomonium. We formulate and solve numerically the coupled-channel equations for t
Externí odkaz:
https://doaj.org/article/ff811c45e1334b29920c2be2c7bbaea5
Publikováno v:
Journal of High Energy Physics, Vol 2017, Iss 4, Pp 1-28 (2017)
Abstract We demonstrate that dispersion theory allows one to deduce crucial information on πη scattering from the final-state interactions of the light mesons visible in the spectral distributions of the decays B ¯ d 0 → J / ψ π 0 η , K + K
Externí odkaz:
https://doaj.org/article/e148d4049eaa4d19abe5706a252da77d
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 77, Iss 2, Pp 1-13 (2017)
Abstract We analyze the most recent data for the pion vector form factor in the timelike region, employing a model-independent approach based on dispersion theory. We confirm earlier observations about the inconsistency of different modern high-preci
Externí odkaz:
https://doaj.org/article/a1aade213f68445aa04a3c79704938de
Publikováno v:
Physics Letters B, Vol 763, Iss , Pp 20-28 (2016)
We revisit the consequences of the heavy-quark spin symmetry for the possible spin partners of the X(3872). We confirm that, if the X(3872) were a DD¯⁎ molecular state with the quantum numbers JPC=1++, then in the strict heavy-quark limit there sh
Externí odkaz:
https://doaj.org/article/1157e1352085432eb451af3a8c8d1524