Studies of the resonance structure in <i>D</i><SUP>0</SUP>→<i>K</i><SUP>∓</SUP> π<SUP>±</SUP> π<SUP>±</SUP> π<SUP>∓</SUP> decays



Aaij, R, Adeva, B, Adinolfi, M, Ajaltouni, Z, Akar, S, Albrecht, J, Alessio, F, Alexander, M, Alfonso Albero, A, Ali, S
et al (show 786 more authors) (2018) Studies of the resonance structure in <i>D</i><SUP>0</SUP>→<i>K</i><SUP>∓</SUP> π<SUP>±</SUP> π<SUP>±</SUP> π<SUP>∓</SUP> decays. EUROPEAN PHYSICAL JOURNAL C, 78 (6). 443-.

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Abstract

Amplitude models are constructed to describe the resonance structure of D 0 → K - π + π + π - and D 0 → K + π - π - π + decays using <i>pp</i> 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 D 0 → a 1 ( 1260 ) + K - and D 0 → K 1 ( 1270 / 1400 ) + π - being prominent in D 0 → K - π + π + π - and D 0 → K + π - π - π + , respectively. Precise measurements of the lineshape parameters and couplings of the a 1 ( 1260 ) + , K 1 ( 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 K 3 π = 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 C P violation.

Item Type: Article
Additional Information: All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2017-040.html
Uncontrolled Keywords: LHCb Collaboration
Depositing User: Symplectic Admin
Date Deposited: 13 Aug 2018 06:53
Last Modified: 14 Mar 2024 23:32
DOI: 10.1140/epjc/s10052-018-5758-4
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3024860