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Advances in High Energy Physics
Volume 2016 (2016), Article ID 4957236, 8 pages
Research Article

Study of Strange Charmed Meson Family Using HQET

School of Physics and Material Science, Thapar University, Patiala, Punjab 147004, India

Received 7 January 2016; Revised 11 March 2016; Accepted 13 March 2016

Academic Editor: Sally Seidel

Copyright © 2016 Pallavi Gupta and A. Upadhyay. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The publication of this article was funded by SCOAP3.


Recently LHCb predicted spin 1 and spin 3 states and which are studied through their strong decays and are assigned to fit the and states in the charm spectroscopy. In this paper, using the heavy quark effective theory, we state that assigning as the mixing of states is rather a better justification to its observed experimental values than a pure state. We study its decay modes variation with hadronic coupling constant and the mixing angle . We appoint spin 3 state as the missing state and also study its decay channel behavior with coupling constant . To appreciate the above results, we check the variation of decay modes for their spin partners states, that is, and , with their masses and strong coupling constant, that is, and . Our calculation using HQET approach gives mixing angle of the state for to lie in the range ( radians radians). Our calculation for coupling constant values gives to lie within value range of and to be 0.40. We expect from experiments to observe this mixing angle to verify our results.