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The resonant substructures of B0→D¯0π+π- decays are studied with the Dalitz plot technique. In this study a data sample corresponding to an integrated luminosity of 3.0 fb-1 of pp collisions collected by the LHCb detector is used. The branching fraction of the B0→D¯0π+π- decay in the region m(D¯0π±)>2.1 GeV/c2 is measured to be (8.46±0.14±0.29±0.40)×10-4, where the first uncertainty is statistical, the second is systematic and the last arises from the normalization channel B0→D∗(2010)-π+. The π+π- S-wave components are modeled with the isobar and K-matrix formalisms. Results of the Dalitz plot analyses using both models are presented. A resonant structure at m(D¯0π-)≈2.8 GeV/c2 is confirmed and its spin-parity is determined for the first time as JP=3-. The branching fraction, mass and width of this structure are determined together with those of the D0∗(2400)- and D2∗(2460)- resonances. The branching fractions of other B0→D¯0h0 decay components with h0→π+π- are also reported. Many of these branching fraction measurements are the most precise to date. The first observation of the decays B0→D¯0f0(500), B0→D¯0f0(980), B0→D¯0ρ(1450), B0→D3∗(2760)-π+ and the first evidence of B0→D¯0f0(2020) are presented.
Dalitz plot analysis of B0 → D ¯ 0π+π- decays / Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Anderson, J., Andreassen, R., et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 92:3(2015), pp. N/A-N/A. [10.1103/PhysRevD.92.032002]
The resonant substructures of B0→D¯0π+π- decays are studied with the Dalitz plot technique. In this study a data sample corresponding to an integrated luminosity of 3.0 fb-1 of pp collisions collected by the LHCb detector is used. The branching fraction of the B0→D¯0π+π- decay in the region m(D¯0π±)>2.1 GeV/c2 is measured to be (8.46±0.14±0.29±0.40)×10-4, where the first uncertainty is statistical, the second is systematic and the last arises from the normalization channel B0→D∗(2010)-π+. The π+π- S-wave components are modeled with the isobar and K-matrix formalisms. Results of the Dalitz plot analyses using both models are presented. A resonant structure at m(D¯0π-)≈2.8 GeV/c2 is confirmed and its spin-parity is determined for the first time as JP=3-. The branching fraction, mass and width of this structure are determined together with those of the D0∗(2400)- and D2∗(2460)- resonances. The branching fractions of other B0→D¯0h0 decay components with h0→π+π- are also reported. Many of these branching fraction measurements are the most precise to date. The first observation of the decays B0→D¯0f0(500), B0→D¯0f0(980), B0→D¯0ρ(1450), B0→D3∗(2760)-π+ and the first evidence of B0→D¯0f0(2020) are presented.
Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1209545
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