The resonant substructures of B0→¯D0π+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→¯D0π+π− decay in the region m(¯D0π±)>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(¯D0π−)≈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 D∗0(2400)− and D∗2(2460)− resonances. The branching fractions of other B0→¯D0h0 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→¯D0f0(500), B0→¯D0f0(980), B0→¯D0ρ(1450), B0→D∗3(2760)−π+ and the first evidence of B0→¯D0f0(2020) are presented.

Dalitz plot analysis of <sup>B0</sup> → <sup>D ¯ 0</sup><sup>π+</sup><sup>π-</sup> 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). [10.1103/PhysRevD.92.032002]

Dalitz plot analysis of B0D ¯ 0π+π- decays

Capriotti, L.;Casse, G.;SARTI, ALESSIO;SCIUBBA, Adalberto;
2015

Abstract

The resonant substructures of B0→¯D0π+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→¯D0π+π− decay in the region m(¯D0π±)>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(¯D0π−)≈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 D∗0(2400)− and D∗2(2460)− resonances. The branching fractions of other B0→¯D0h0 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→¯D0f0(500), B0→¯D0f0(980), B0→¯D0ρ(1450), B0→D∗3(2760)−π+ and the first evidence of B0→¯D0f0(2020) are presented.
2015
Nuclear and High Energy Physics
01 Pubblicazione su rivista::01a Articolo in rivista
Dalitz plot analysis of <sup>B0</sup> → <sup>D ¯ 0</sup><sup>π+</sup><sup>π-</sup> 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). [10.1103/PhysRevD.92.032002]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/836082
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