| Naslov: | Isospin violating decays of positive parity Bs mesons in HMχPT |
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| Avtorji: | ID Fajfer, Svjetlana (Avtor)
ID Prapotnik Brdnik, Anita (Avtor) |
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| Datoteke: |  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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| Jezik: | Angleški jezik |
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| Vrsta gradiva: | Znanstveno delo |
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| Tipologija: | 1.01 - Izvirni znanstveni članek |
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| Organizacija: | FGPA - Fakulteta za gradbeništvo, prometno inženirstvo in arhitekturo
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| Opis: | 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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| Ključne besede: | physics, elementary particles, B mesons, decays |
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| Status publikacije: | Objavljeno |
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| Verzija publikacije: | Objavljena publikacija |
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| Leto izida: | 2016 |
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| Št. strani: | str. 1-11 |
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| Številčenje: | Letn. 76 |
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| PID: | 20.500.12556/DKUM-66444  |
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| ISSN: | 1434-6044 |
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| UDK: | 539.12 |
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| COBISS.SI-ID: | 3014756 |
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| DOI: | 10.1140/epjc/s10052-016-4377-1 |
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| ISSN pri članku: | 1434-6044 |
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| NUK URN: | URN:SI:UM:DK:PEJ9NQLO |
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| Datum objave v DKUM: | 26.06.2017 |
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| Število ogledov: | 1084 |
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| Število prenosov: | 158 |
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| Metapodatki: |    |
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| Področja: | Ostalo
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