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Strong decay analysis of excited nonstrange charmed mesons: implications for spectroscopy

  • Regular Article – Theoretical Physics
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Abstract

The strong decays of experimentally observed excited nonstrange charmed mesons are analyzed in the framework of heavy quark effective theory (HQET). The ratio of the strong decay rates identified the doublets \((D_1(2420), D_2^*(2460))\) as \((1^3P_1, 1^3P_2)\), \((D(2550), D_J^*(2600))\) as \((2^1S_0, 2^3S_1)\) and \((D(2740), D_J^*(2750))\) as \((1^3D_2, 1^3D_3)\). The \(D_J(3000)\) is interpreted as the mixing of \(2^1P_1 - 2^3P_1\) states. The resonances \(D{_{J}^*}(3000)\) and \(D_2^*(3000)\) are identified with \(2^3P_2\) and \(1^3F_2\) quantum states, respectively. Such states allows to construct the Regge trajectories in \((M^2, J)\) and \((M^2, n_r)\) planes. We fix the slope and the intercept of each Regge line and estimate the masses of higher excited nonstrange charmed mesons which are lying on the Regge lines. Also, the ratios of the strong decay rates of this higher excited nonstrange charmed mesons are calculated. It can provide valuable information to future experimental search.

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Data Availability Statement

This manuscript has no associated data or the data will not be deposited. [Authors’ comment: This is a theoretical study and no experimental data.]

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Acknowledgements

One of the author Mr. Keval Gandhi inspired by the work of Prof. A. V. Manohar, Prof. M. B. Wise, Prof. M. Neubert, Prof. A. F. Falk, Prof. M. E. Luke, Prof. R. Casalbuoni, Prof. S. Campanella, Prof. P. Colangelo, Prof. F. De Fazio and Prof. Z.-G. Wang on HQET and would like to thank them for their valuable contributions to this field. Special thanks to Prof. T. Matsuki for his valuable suggestion to improve the manuscript.

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  1. Department of Applied Physics, Sardar Vallabhbhai National Institute of Technology, Surat, Gujarat, 395007, India

    Keval Gandhi & Ajay Kumar Rai

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  1. Keval Gandhi
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  2. Ajay Kumar Rai
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Correspondence to Ajay Kumar Rai.

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Communicated by Eulogio Oset

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Gandhi, K., Rai, A.K. Strong decay analysis of excited nonstrange charmed mesons: implications for spectroscopy. Eur. Phys. J. A 57, 23 (2021). https://doi.org/10.1140/epja/s10050-020-00332-4

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