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Isospin violating decays of positive parity Bs mesons in HMχPT
Svjetlana Fajfer, Anita Prapotnik Brdnik, 2016, original scientific article

Abstract: Recent lattice QCD results suggest that the masses of the first two positive parity Bs mesons lie below the BK threshold, similar to the case of D∗s0(2317)+ and Ds1(2460)+ mesons. The mass spectrum of Bs mesons seems to follow the pattern of a Ds mass spectrum. As in the case of charmed mesons, the structure of positive parity Bs mesons is very intriguing. To shed more light on this issue, we investigate the strong isospin violating decays B∗0s0→B0sπ0, B0s1→B∗0sπ0, and B0s1→B0sππ within heavy meson chiral perturbation theory. The two-body decay amplitude arises at tree level and we show that the loop corrections give significant contributions. On the other hand, in the case of three-body decay B0s1→B0sππ the amplitude occurs only at loop level. We find that the decay widths for these decays are Γ(B0s1→B0sππ)∼10−3 keV, and Γ(B∗0s0→B0sπ0)≤55 keV, Γ(B0s1→B∗0sπ0)≤50 keV. More precise knowledge of the coupling constant describing the interaction of positive and negative parity heavy mesons with light pseudo-scalar mesons would help to increase the accuracy of our calculation.
Keywords: physics, elementary particles, B mesons, decays
Published: 26.06.2017; Views: 434; Downloads: 57
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Pentaquarks and the mass spectrum of the elementary particles of the standard model
Leila Marek-Crnjac, 2006, original scientific article

Abstract: Predstavljene so nove izrazitve matematičnega upanja mase pentakvarka. Možna povezava med Higgsovimi masami in maso pentakvarka je bila raziskana (El Naschie M. S.: Pentaqkvarkovo masno pravilo vsote in Higgsovi delci). Higgsove mase in pentakvarkove mase se lahko izrazijo s supersimetrično konstanto, z nesupersimetrično konstanto in tudi z napovedanim številom elementarnih delcev standardnega modela ▫$N(MS) approx 69$▫. Teoretične napovedi masnega spektra elementarnih delcev standardnega modela so prikazane v tabeli skupaj z razcepitvenimi faktorji.
Keywords: pentakvark, Higgsov delec, masni spekter, elementarni delci standardnega modela, super simetrična konstanta, pentaquark, Higgs particle, mass spectrum, elementary particles of the standard model, super symmetric coupling constant
Published: 10.07.2015; Views: 580; Downloads: 66
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Exceptional and semi simple Lie groups hierarchies and the maximum number of elementary particles beyond the standard model of high energy physics
Leila Marek-Crnjac, 2008, original scientific article

Abstract: In this work and following some major developments in our understanding of the connection between the exceptional Lie symmetry groups hierarchy and physics, we present finite and infinite dimensional Lie groups and their connections to the orthogonal and unitary groups. The dimension of the Lie group is included in the derivation of the number of elementary particle-likes uper states 576 and 672. Connections to the dimensions of Lie groups and the 72 and 84 elementary particles recently considered by the Author are discussed.
Keywords: Lie groups, elementary particles, algebra
Published: 31.05.2012; Views: 1627; Downloads: 72
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