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 √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)0 π+ 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.

Aaij, R., Abdelmotteleb, A.S.W., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adeva, B., et al. (2023). Amplitude Analysis of the D+ → π− π+ π+ Decay and Measurement of the π− π+ S-Wave Amplitude. JOURNAL OF HIGH ENERGY PHYSICS, 2023(6), 0-27 [10.1007/jhep06(2023)044].

Amplitude Analysis of the D+ → π− π+ π+ Decay and Measurement of the π− π+ S-Wave Amplitude

Carbone, A.;Ferrari, F.;Galli, D.;Manuzzi, D.;Patrignani, C.;Villa, A.;Zucchelli, S.;
2023

Abstract

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 √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)0 π+ 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.
2023
Aaij, R., Abdelmotteleb, A.S.W., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adeva, B., et al. (2023). Amplitude Analysis of the D+ → π− π+ π+ Decay and Measurement of the π− π+ S-Wave Amplitude. JOURNAL OF HIGH ENERGY PHYSICS, 2023(6), 0-27 [10.1007/jhep06(2023)044].
Aaij, R.; Abdelmotteleb, A. S. W.; Abellan Beteta, C.; Abudinén, F.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Afsharnia, H.; Agapopoulou, C.; Aidala, C...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/951738
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