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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/185387
Studies of the resonance structure in D0→ K∓π±π±π∓ decays
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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 f b−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 RK3π = 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.
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ALFONSO ALBERO, Alejandro, et al. Studies of the resonance structure in D0→ K∓π±π±π∓ decays. European Physical Journal C. 2018. Vol. 78, num. 6, pags. 1-32. ISSN 1434-6044. [consulted: 26 of May of 2026]. Available at: https://hdl.handle.net/2445/185387