Observation of photon polarization in the b→sγ transition
This letter presents a study of the flavor-changing neutral current radiative B±→K±π∓π±γ decays performed using data collected in proton-proton collisions with the LHCb detector at 7 and 8 TeV center-of-mass energies. In this sample, corresponding to an integrated luminosity of 3 fb−1, nearly 14 000...
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| Hauptverfasser: | , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
22 April 2014
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| In: |
Physical review letters
Year: 2014, Jahrgang: 112, Heft: 16 |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.112.161801 |
| Online-Zugang: | Resolving-System, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevLett.112.161801 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.112.161801 |
| Verfasserangaben: | R. Aaij et al. (LHCb Collaboration) |
MARC
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| 245 | 1 | 0 | |a Observation of photon polarization in the b→sγ transition |c R. Aaij et al. (LHCb Collaboration) |
| 246 | 3 | 0 | |a b → sγ s γ gamma sgamma |
| 246 | 3 | 3 | |a Observation of photon polarization in the b→s[gamma] transition |
| 264 | 1 | |c 22 April 2014 | |
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| 500 | |a Im Titel wird der griechische Buchstabe gamma verwendet | ||
| 500 | |a The LHCb Collaboration: R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, J. Albrecht, F. Alessio, M. Alexander, S. Ali, G. Alkhazov [und 673 weitere] | ||
| 500 | |a Gesehen am 15.09.2020 | ||
| 520 | |a This letter presents a study of the flavor-changing neutral current radiative B±→K±π∓π±γ decays performed using data collected in proton-proton collisions with the LHCb detector at 7 and 8 TeV center-of-mass energies. In this sample, corresponding to an integrated luminosity of 3 fb−1, nearly 14 000 signal events are reconstructed and selected, containing all possible intermediate resonances with a K±π∓π± final state in the [1.1,1.9] GeV/c2 mass range. The distribution of the angle of the photon direction with respect to the plane defined by the final-state hadrons in their rest frame is studied in intervals of K±π∓π± mass and the asymmetry between the number of signal events found on each side of the plane is obtained. The first direct observation of the photon polarization in the b→sγ transition is reported with a significance of 5.2σ. | ||
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