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Loosely bound states near the charm threshold. Charm molecules

Связанные состояния вблизи «очарованного» порога. Очарованные молекулы

  • Published:
Il Nuovo Cimento A (1971-1996)

Summary

We discuss the possibility of loosely bound states near the charm threshold in the charmed-particle and antiparticle system such as\(D\bar D, D*\bar D*\), etc. An explicit calculation shows that theS- andP-wave states exist in the\(D\bar D\) system with reasonable values for the parameters of the interaction. These bound states may be very close to threshold with large sizes (r.m.s.≳1 fm). Characteristics of these molecularlike states and their relationship with the quark model\(c\bar c\) bound states are also discussed.

Riassunto

Si discute la possibilità di stati lassamente legati vicino alla soglia dell'incanto nel sistema particella antiparticella incantata come ad esempio\(D\bar D, D*\bar D*\), ecc. Un calcolo esplicito mostra che gli stati delle ondeS eP esistono nel sistema\(D\bar D\) con valori ragionevoli per i parametri dell'interazione. Questi stati legati possono essere molto vicini alla soglia con grandi valori (r.m.q.≳1 fm). Si discutono anche le caratteristiche di questi stati del tipo molecolare e il loro rapporto con gli stati legati\(c\bar c\) del modello a quark.

Резюме

Мы обсуждаем возможность связанных состояний вблизи «очарованного» порога в системе очарованных частиц и античастиц, таких как\(D\bar D, D*\bar D*\)и др. Вычисления показывают, что существуютS- иP-волновые состояния в\(D\bar D\) системе с разумными значениями для параметров взаимодействия. Эти связанные состояния могут быть очень близки к порогу с большими размерами (r.m.s.≳1 фм). Также обсуждаются характеристики этих молекулярноподобных состояний и их связь с\(c\bar c\)} связанными состояниями в модели кварков.

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Author notes

  1. S. Nussinov

    Present address: Tel Aviv University, Ramat-Aviv, Tel Aviv, Israel

Authors and Affiliations

  1. Fermi National Accelerator Laboratory, 60510, Batavia, Ill., USA

    S. Nussinov & D. P. Sidhu

  2. Institute for Advanced Study, 08540, Princeton, N. J., USA

    S. Nussinov

  3. Brookhaven National Laboratory, 11973, Upton, N. Y., USA

    D. P. Sidhu

Authors
  1. S. Nussinov
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  2. D. P. Sidhu
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Additional information

Supported, in part, by Energy Research and Development Administration Grant No. E(11-1)-2220.

Work supported by Energy Research and Development Administration.

Traduzione a cura della Redazione.

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Nussinov, S., Sidhu, D.P. Loosely bound states near the charm threshold. Charm molecules. Nuov Cim A 44, 230–240 (1978). https://doi.org/10.1007/BF02813394

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