| Title: | Isospin violating decays of positive parity Bs mesons in HMχPT |
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| Authors: | ID Fajfer, Svjetlana (Author)
ID Prapotnik Brdnik, Anita (Author) |
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| Files: |  European_Physical_Journal_C_2016_Fajfer,_Prapotnik_Brdnik_Isospin_violating_decays_of_positive_parity_Bs_mesons_in_HMχPT.pdf (743,71 KB)
MD5: DAABF9F3FBA260C64EF20251DF6975C1
 http://link.springer.com/10.1140/epjc/s10052-016-4377-1
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| Language: | English |
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| Work type: | Scientific work |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | FGPA - Faculty of Civil Engineering, Transportation Engineering and Architecture
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| 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. |
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| Keywords: | physics, elementary particles, B mesons, decays |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Year of publishing: | 2016 |
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| Number of pages: | str. 1-11 |
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| Numbering: | Letn. 76 |
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| PID: | 20.500.12556/DKUM-66444  |
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| ISSN: | 1434-6044 |
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| UDC: | 539.12 |
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| ISSN on article: | 1434-6044 |
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| COBISS.SI-ID: | 3014756 |
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| DOI: | 10.1140/epjc/s10052-016-4377-1 |
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| NUK URN: | URN:SI:UM:DK:PEJ9NQLO |
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| Publication date in DKUM: | 26.06.2017 |
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| Views: | 1085 |
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| Downloads: | 158 |
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| Metadata: |    |
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| Categories: | Misc.
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