Abstract
Abstract A study of D +π−, D 0π+ and D ∗+π− final states is performed using pp collision data, corresponding to an integrated luminosity of 1.0 fb−1, collected at a centre-of-mass energy of 7 TeV with the LHCb detector. The D 1(2420)0 resonance is observed in the D ∗+π− final state and the $ D_2^{*}\left( {2460} \right) $ resonance is observed in the D +π−, D 0π+ and D ∗+π− final states. For both resonances, their properties and spin-parity assignments are obtained. In addition, two natural parity and two unnatural parity resonances are observed in the mass region between 2500 and 2800 MeV. Further structures in the region around 3000 MeV are observed in all the D ∗+π−, D +π− and D 0π+ final states.
Highlights
The theoretical predictions are in agreement with observations for the 1S states and the JP = 2+ and JP = 1+ 1P states
This paper reports a search for DJ mesons in a data sample, corresponding to an integrated luminosity of 1.0 fb−1, of pp collisions collected at a centre-of-mass energy of 7 TeV with the LHCb detector
A study of the D+π−, D0π+, and D∗+π− final states is reported using a sample of pp collision data, corresponding to an integrated luminosity of 1.0 fb−1, collected at a centreof-mass energy of 7 TeV with the LHCb detector
Summary
The discrepancy between the predictions of various models and the mass measurements [6,7,8,9] suggests that some observed states in the cscase are not simple quark-antiquark configurations. To search for excited charmed mesons, labelled DJ , BaBar analyzed the inclusive production of the D+π−, D0π+ and D∗+π− final states in the inclusive reaction e+e− → cc → D(∗)πX, where X is any additional system [18].2. They observe four signals, labelled D(2550)0, D∗(2600)0, D(2750)0 and D∗(2760)0, and the isospin partners D∗(2600)+ and D∗(2760)+. The trigger [20] consists of a hardware stage, based on information from the calorimeter and muon systems, followed by a software stage which applies a full event reconstruction
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