Study of the doubly charmed tetraquark T+cc

Quantum chromodynamics, the theory of the strong force, describes interactions of coloured quarks and gluons and the formation of hadronic matter. Conventional hadronic matter consists of baryons and mesons made of three quarks and quark-antiquark pairs, respectively. Particles with an alternative quark content are known as exotic states. Here a study is reported of an exotic narrow state in the D0D0π+ mass spectrum just below the D*+D0 mass threshold produced in proton-proton collisions collected with the LHCb detector at the Large Hadron Collider. The state is consistent with the ground isoscalar T+cc tetraquark with a quark content of ccu⎯⎯⎯d⎯⎯⎯ and spin-parity quantum numbers JP = 1+. Study of the DD mass spectra disfavours interpretation of the resonance as the isovector state. The decay structure via intermediate off-shell D*+ mesons is consistent with the observed D0π+ mass distribution. To analyse the mass of the resonance and its coupling to the D*D system, a dedicated model is developed under the assumption of an isoscalar axial-vector T+cc state decaying to the D*D channel. Using this model, resonance parameters including the pole position, scattering length, effective range and compositeness are determined to reveal important information about the nature of the T+cc state. In addition, an unexpected dependence of the production rate on track multiplicity is observed

Expert Consensus on the Core Competency Framework of Chinese Clinical Pharmacist (2023)

In the new era of hospital pharmaceutical service transformation, higher standards and requirements are constantly put forward for clinical pharmacists to participate in patient-centered pharmaceutical professional technical services. The formulation of competency standards has become an international trend. However, research on pharmacist competency is still limited in China, and there is a lack of core competency framework for clinical pharmacists. In order to facilitate the construction of pharmacist competency, Peking Union Medical College Hospital, China Medical Board and Chinese Hospital Association Pharmaceutical Specialized Committee organized multidisciplinary experts in pharmacy, clinical medicine, education and administration to formulate Expert Consensus on the Core Competency Framework of Chinese Clinical Pharmacist (2023), which is based on domestic and foreign research results and clinical pharmacy practice in China. This specialist consensus, adopting the modified Delphi method to formulate the core competency framework of Chinese clinical pharmacist, determines six first-level item of core competencies that clinical pharmacists should have, including professionalism, knowledge and skill, patient care, communication and collaboration, teaching and lifelong learning. The six first-level items have twenty-two second-level items, which are explained in detail. This consensus can provide an important basis and exploration direction for the training and ability enhancement of clinical pharmacists in China