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Autor:
R. Martinez, S. F. Mantilla
Publikováno v:
EPJ Web of Conferences, Vol 182, p 02084 (2018)
We propose a new $\mathrm{SU}(3)_C \otimes \mathrm{SU}(2)_{L}\otimes \mathrm{U}(1)_{Y}\otimes \mathrm{U}(1)_{X}$ gauge model which is non universal respect to the three fermion families of the Standard Model. We introduce additional one top-like quar
Autor:
Anastasiia Kozachuk
Publikováno v:
EPJ Web of Conferences, Vol 191, p 02012 (2018)
We revisit rare radiative leptonic decays Bd,s → γμ+μ- and Bd,s → γe+e- in the Standard Model and obtain predictions for a number of differential distributions in these decays with special emphasis on the contribution of charm-quark loops.
Autor:
André Mischke, Paul Kuijer
Publikováno v:
EPJ Web of Conferences, Vol 171, p 00001 (2018)
Publikováno v:
EPJ Web of Conferences, Vol 175, p 10001 (2018)
We study the effective theory of decoupling of a charm quark at low energies. We do this by simulating a model, QCD with two mass-degenerate charm quarks. At leading order the effective theory is a pure gauge theory. By computing ratios of hadronic s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0e24cc81fc68e4aefb290aac700fbf5a
https://www.repository.cam.ac.uk/handle/1810/285417
https://www.repository.cam.ac.uk/handle/1810/285417
Autor:
A. Giachino, E. Santopinto
Publikováno v:
EPJ Web of Conferences, Vol 192, p 00043 (2018)
We investigated the lightest pentaquark state observed by the LHCb collaboration as a compact five-quark ground-state, with spin S = 3/2, and we showed that this state belongs to a SUf(3) flavor octet by means of a group theory approach. Moreover, we
Autor:
Kostas Kordas
Publikováno v:
EPJ Web of Conferences, Vol 182, p 02067 (2018)
The electroweak sector of the Standard Model can be tested by precision measurements of its fundamental parameters, such as the W boson mass or the electroweak mixing angle. In this contribution we present the first measurement of the W boson mass, b
Autor:
Peter Minkowski
Publikováno v:
EPJ Web of Conferences, Vol 182, p 02087 (2018)
In a first part neutrino properties are presented from the beginnings through the letter of Wolfgang Pauli on 4. December 1930 suggesting a new neutral fermion to the “Radioactive Ladies and Gentlemen” at a Conference in Tübingen, contributing t
Autor:
Mikhail A. Ivanov
Publikováno v:
EPJ Web of Conferences, Vol 192, p 00042 (2018)
We present a dynamical approach for description of the multi-quark states that is based on an effective interaction Lagrangian describing the coupling of hadrons to their constituent quarks. First, we explore the consequences of treating the $X(3872)
Autor:
A. E. Putilova, Alexander A. Andrianov, Vladimir A. Andrianov, Domenec Espriu, A.V. Iakubovich
Publikováno v:
EPJ Web of Conferences, Vol 191, p 05014 (2018)
The possibility of the formation of a local parity breaking in a quark-hadron medium is described as a result of a violation of chiral symmetry, i.e, the difference between the average numbers of right and left -handing quarks in the fireball after H
Publikováno v:
EPJ Web of Conferences, Vol 175, p 05023 (2018)
We report on our progress in studying exotic, heavy tetraquark states, $qq\prime \bar Q\bar Q\prime$. Using publicly available dynamical $n_f =2+1$ Wilson-Clover gauge configurations, generated by the PACS-CS collaboration, with pion masses $\simeq$1