Amplitude analysis of the D+ → π−π+π+ decay and measurement of the π−π+ S-wave amplitude
An amplitude analysis of the D+ → π−π+π+ decay is performed with a sample corresponding to 1.5 fb−1 of integrated luminosity of pp collisions at a centre-of-mass energy $$ \sqrt{s} $$= 8 TeV collected by the LHCb detector in 2012. The sample contains approximately six hundred thousand candidates wit...
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| Main Authors: | , , , , , , , , , , , , , |
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| Corporate Author: | |
| Format: | Article (Journal) |
| Language: | English |
| Published: |
June 9, 2023
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| In: |
Journal of high energy physics
Year: 2023, Issue: 6, Pages: 1-28 |
| ISSN: | 1029-8479 |
| DOI: | 10.1007/JHEP06(2023)044 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1007/JHEP06(2023)044
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| Author Notes: | The LHCb collaboration |
| Summary: | An amplitude analysis of the D+ → π−π+π+ decay is performed with a sample corresponding to 1.5 fb−1 of integrated luminosity of pp collisions at a centre-of-mass energy $$ \sqrt{s} $$= 8 TeV collected by the LHCb detector in 2012. The sample contains approximately six hundred thousand candidates with a signal purity of 95%. The resonant structure is studied through a fit to the Dalitz plot where the π−π+ S-wave amplitude is extracted as a function of π−π+ mass, and spin-1 and spin-2 resonances are included coherently through an isobar model. The S-wave component is found to be dominant, followed by the ρ(770)0π+ and f2(1270)π+ components. A small contribution from the ω(782) → π−π+ decay is seen for the first time in the D+ → π−π+π+ decay. |
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| Item Description: | Im Text sind "+" und "-" hochgestellt The LHCb collaboration: R. Aaij, S. Bachmann, R. Caspary, G. Frau, P.A. Günther, X. Han, S. Hansmann-Menzemer, J. Hu, B. Leverington, J. Marks, D.J. Unverzagt, U. Uwer, L. Witola, A. Zhelezov [und viele weitere] Gesehen am 06.11.2023 |
| Physical Description: | Online Resource |
| ISSN: | 1029-8479 |
| DOI: | 10.1007/JHEP06(2023)044 |