Studies of the resonance structure in D0→Kπ[minus-plus]π±π±π[minus-plus] decays
Amplitude models are constructed to describe the resonance structure of D0→K−π+π+π−D0→K−π+π+π−{D^{0}\rightarrow K^{-}\pi ^{+}\pi ^{+}\pi ^{-}} and D0→K+π−π−π+D0→K+π−π−π+{D^{0} \rightarrow K^{+}\pi ^{-}\pi ^{-}\pi ^{+}} decays using pp collision data collected at centre-of-mass energies of 7 and 8 Te...
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Corporate Author: | |
| Format: | Article (Journal) |
| Language: | English |
| Published: |
2 June 2018
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| In: |
The European physical journal. C, Particles and fields
Year: 2018, Volume: 78, Issue: 6 |
| ISSN: | 1434-6052 |
| DOI: | 10.1140/epjc/s10052-018-5758-4 |
| Online Access: | Verlag, Volltext: https://doi.org/10.1140/epjc/s10052-018-5758-4 Verlag, Volltext: https://link.springer.com/content/pdf/10.1140%2Fepjc%2Fs10052-018-5758-4.pdf 
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| Author Notes: | LHCb collaboration* |
| Summary: | Amplitude models are constructed to describe the resonance structure of D0→K−π+π+π−D0→K−π+π+π−{D^{0}\rightarrow K^{-}\pi ^{+}\pi ^{+}\pi ^{-}} and D0→K+π−π−π+D0→K+π−π−π+{D^{0} \rightarrow K^{+}\pi ^{-}\pi ^{-}\pi ^{+}} 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−1fb−1fb^{-1}. The largest contributions to both decay amplitudes are found to come from axial resonances, with decay modes D0→a1(1260)+K−D0→a1(1260)+K−D^{0} \rightarrow a_1(1260)^{+} K^{-} and D0→K1(1270/1400)+π−D0→K1(1270/1400)+π−D^{0} \rightarrow K_1(1270/1400)^{+} \pi ^{-} being prominent in D0→K−π+π+π−D0→K−π+π+π−{D^{0}\rightarrow K^{-}\pi ^{+}\pi ^{+}\pi ^{-}} and D0→K+π−π−π+D0→K+π−π−π+D^{0}\rightarrow K^{+}\pi ^{-}\pi ^{-}\pi ^{+}, respectively. Precise measurements of the lineshape parameters and couplings of the a1(1260)+a1(1260)+a_1(1260)^{+}, K1(1270)−K1(1270)−K_1(1270)^{-} and K(1460)−K(1460)−K(1460)^{-} resonances are made, and a quasi model-independent study of the K(1460)−K(1460)−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)RK3π=0.459±0.010(stat)±0.012(syst)±0.020(model)R_{K3\pi } = 0.459\pm 0.010\,(\mathrm {stat}) \pm 0.012\,(\mathrm {syst}) \pm 0.020\,(\mathrm {model}), which is consistent with direct measurements. These models will be useful in future measurements of the unitary-triangle angle γγ\gamma and studies of charm mixing and CPCPC\!P violation. |
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| Item Description: | Im Titel wird "pi" als griechischer Buchstabe dargestellt Im Titel ist die Ziffer "0" hochgestellt Im Titel sind die Zeichen "plus-minus" und "minus-plus"hochgestellt LHCb collaboration: R. Aaij, P. d'Argent, S. Bachmann, D. Berninghoff, S. Braun, A. Comerma-Montells, M. De Cian, F. Dordei, M. Dziewiecki, D. Gerick, J.P. Grabowski, X. Han, S. Hansmann-Menzemer, M. Kecke, B. Khanji, M. Kolpin, R. Kopecna, B. Leverington, J. Marks, D.S. Mitzel, S. Neubert, A. Piucci, M. Stahl, S. Stemmle, J. van Tilburg, U. Uwer, A. Zhelezov [und weitere] Gesehen am 13.06.2019 |
| Physical Description: | Online Resource |
| ISSN: | 1434-6052 |
| DOI: | 10.1140/epjc/s10052-018-5758-4 |