Amplitude models are constructed to describe the resonance structure of D0 → K− π+ π+ π− and D0 → K+ π− π− π+ decays using pp collision data collected at centre-of-mass energies of 7 and 8 TeV with the LHCb experiment, corresponding to an integrated luminosity of 3.0 fb^−1. The largest contributions to both decay amplitudes are found to come from axial resonances, with decay modes D0 → a1(1260)+ K− and D0 → K1(1270/1400)+ π− being prominent in D0 → K− π+ π+ π− and D0 → K+ π− π− π+, respectively. Precise measurements of the lineshape parameters and couplings of the a1(1260)+, K1(1270)− and K(1460)− resonances are made, and a quasi model-independent study of the K(1460)− resonance is performed. The coherence factor of the decays is calculated from the amplitude models to be R_K3π = 0.459 ± 0.010(stat) ± 0.012(syst) ± 0.020(model), which is consistent with direct measurements. These models will be useful in future measurements of the unitary-triangle angle γ and studies of charm mixing and CP violation.

Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., et al. (2018). Studies of the Resonance Structure in D0 → K∓ π± π± π∓ Decays. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 78(6), 1-31 [10.1140/epjc/s10052-018-5758-4].

Studies of the Resonance Structure in D0 → K∓ π± π± π∓ Decays

Betti, F.;Capriotti, L.;Carbone, A.;Ferrari, F.;Galli, D.;Marconi, U.;Patrignani, C.;Perazzini, S.;Pisani, F.;Vagnoni, V.;Zucchelli, S.
2018

Abstract

Amplitude models are constructed to describe the resonance structure of D0 → K− π+ π+ π− and D0 → K+ π− π− π+ decays using pp collision data collected at centre-of-mass energies of 7 and 8 TeV with the LHCb experiment, corresponding to an integrated luminosity of 3.0 fb^−1. The largest contributions to both decay amplitudes are found to come from axial resonances, with decay modes D0 → a1(1260)+ K− and D0 → K1(1270/1400)+ π− being prominent in D0 → K− π+ π+ π− and D0 → K+ π− π− π+, respectively. Precise measurements of the lineshape parameters and couplings of the a1(1260)+, K1(1270)− and K(1460)− resonances are made, and a quasi model-independent study of the K(1460)− resonance is performed. The coherence factor of the decays is calculated from the amplitude models to be R_K3π = 0.459 ± 0.010(stat) ± 0.012(syst) ± 0.020(model), which is consistent with direct measurements. These models will be useful in future measurements of the unitary-triangle angle γ and studies of charm mixing and CP violation.
2018
Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., et al. (2018). Studies of the Resonance Structure in D0 → K∓ π± π± π∓ Decays. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 78(6), 1-31 [10.1140/epjc/s10052-018-5758-4].
Aaij, R.; Adeva, B.; Adinolfi, M.; Ajaltouni, Z.; Akar, S.; Albrecht, J.; Alessio, F.; Alexander, M.; Alfonso Albero, A.; Ali, S.; Alkhazov, G.; Alvar...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/640552
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