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Model-independent measurement of the CKM angle γ using B0 → DK∗0 decays with D → KS0π+π− and KS0K+K−
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LHCb collaboration (Including: Back, J. J., Blake, Thomas, Crocombe, Andrew, Gershon, T. J., Kreps, Michal, Langenbruch, Christoph, Latham, Thomas, Loh, David, Mathad, Abhijit , O’Hanlon, Daniel, Poluektov, Anton, Wallace, Charlotte and Wicht, Jean). (2016) Model-independent measurement of the CKM angle γ using B0 → DK∗0 decays with D → KS0π+π− and KS0K+K−. Journal of High Energy Physics, 2016 (6). 131. doi:10.1007/jhep06(2016)131 ISSN 1029-8479.
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Official URL: https://doi.org/10.1007/jhep06(2016)131
Abstract
A binned Dalitz plot analysis of the decays B0 → DK∗0, with D → KS0π+π− and D → KS0K+K−, is performed to measure the observables x± and y±, which are related to the CKM angle γ and the hadronic parameters of the decays. The D decay strong phase variation over the Dalitz plot is taken from measurements performed at the CLEO-c experiment, making the analysis independent of the D decay model. With a sample of proton-proton collision data, corresponding to an integrated luminosity of 3.0 fb−1, collected by the LHCb experiment, the values of the CP violation parameters are found to be x+ = 0.05 ± 0.35 ± 0.02, x− = −0.31 ± 0.20 ± 0.04, y+ = −0.81 ± 0.28 ± 0.06 and y− = 0.31 ± 0.21 ± 0.05, where the first uncertainties are statistical and the second systematic. These observables correspond to values γ = (71 ± 20)°, rB0=0.56±0.17 and δB0=204−20+21°. The parameters rB0 and δB0 are the magnitude ratio and strong phase difference between the suppressed and favoured B0 decay amplitudes, and have been measured in a region of ±50 MeV/c2 around the K∗(892)0 mass and with the magnitude of the cosine of the K∗(892)0 helicity angle larger than 0.4.
Item Type: | Journal Article | ||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||
SWORD Depositor: | Library Publications Router | ||||||
Journal or Publication Title: | Journal of High Energy Physics | ||||||
Publisher: | Springer Berlin Heidelberg | ||||||
ISSN: | 1029-8479 | ||||||
Official Date: | 21 June 2016 | ||||||
Dates: |
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Volume: | 2016 | ||||||
Number: | 6 | ||||||
Article Number: | 131 | ||||||
DOI: | 10.1007/jhep06(2016)131 | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||
Date of first compliant deposit: | 14 September 2018 | ||||||
Date of first compliant Open Access: | 14 September 2018 |
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