Some Predictions of Diquark Model for Hidden Charm Pentaquark Discovered at the LHCb

The LHCb has discovered two new states with preferred $J^P$ quantum numbers $3/2^-$ and $5/2^+$ from $\Lambda_b$ decays. These new states can be interpreted as hidden charm pentaquarks. It has been argued that the main features of these pentaquarks can be described by diquark model. The diquark model predicts that the $3/2^-$ and $5/2^+$ are in two separate octet multiplets of flavor $SU(3)$ and there is also an additional decuplet pentaquark multiplet. Finding the states in these multiplets can provide crucial evidence for this model. The weak decays of b-baryon to a light meson and a pentaquark can have Cabibbo allowed and suppressed decay channels. We find that in the $SU(3)$ limit, for $U$-spin related decay modes the ratio of the decay rates of Cabibbo suppressed to Cabibbo allowed decay channels is given by $|V_{cd}|^2/|V_{cs}|^2$. There are also other testable relations for b-baryon weak decays into a pentaquark and a light pseudoscalar. These relations can be used as tests for the diquark model for pentaquark.Comment: revtex, 19 pages, 3 figures. one reference added and some typos correcte

Search for a heavy dark photon at future e+e−e^+e^- colliders

A coupling of a dark photon $A'$ from a $U(1)_{A'}$ with the standard model (SM) particles can be generated through kinetic mixing represented by a parameter $\epsilon$. A non-zero $\epsilon$ also induces a mixing between $A'$ and $Z$ if dark photon mass $m_{A'}$ is not zero. This mixing can be large when $m_{A'}$ is close to $m_Z$ even if the parameter $\epsilon$ is small. Many efforts have been made to constrain the parameter $\epsilon$ for a low dark photon mass $m_{A'}$ compared with the $Z$ boson mass $m_Z$. We study the search for dark photon in $e^+e^- \to \gamma A' \to \gamma \mu^+ \mu^-$ for a dark photon mass $m_{A'}$ as large as kinematically allowed at future $e^+e^-$ colliders. For large $m_{A'}$, care should be taken to properly treat possible large mixing between $A'$ and $Z$. We obtain sensitivities to the parameter $\epsilon$ for a wide range of dark photon mass at planed $e^+\;e^-$ colliders, such as Circular Electron Positron Collider (CEPC), International Linear Collider (ILC) and Future Circular Collider (FCC-ee). For the dark photon mass $20~\text{GeV}\lesssim m_{A^{\prime}}\lesssim 330~\text{GeV}$, the $2\sigma$ exclusion limits on the mixing parameter are $\epsilon\lesssim 10^{-3}-10^{-2}$. The CEPC with $\sqrt{s}=240~\text{GeV}$ and FCC-ee with $\sqrt{s}=160~\text{GeV}$ are more sensitive than the constraint from current LHCb measurement once the dark photon mass $m_{A^{\prime}}\gtrsim 50~\text{GeV}$. For $m_{A^{\prime}}\gtrsim 220~\text{GeV}$, the sensitivity at the FCC-ee with $\sqrt{s}=350~\text{GeV}$ and $1.5~\text{ab}^{-1}$ is better than that at the 13~TeV LHC with $300~\text{fb}^{-1}$, while the sensitivity at the CEPC with $\sqrt{s}=240~\text{GeV}$ and $5~\text{ab}^{-1}$ can be even better than that at 13~TeV LHC with $3~\text{ab}^{-1}$ for $m_{A^{\prime}}\gtrsim 180~\text{GeV}$.Comment: 21 pages, 5 figures, 2 table

From Evolution of Dialect “Huoguo” to Harmonious Essence of Jing-chu Culture

The purpose of this paper is to study the relationship of language and culture from a typical microscopic perspective of harmonious essence of Jingzhou culture in the evolution of dialect “huoguo” (or: “hodgepodge” ) from which we get the conclusion that language and culture are so highly influenced with each other that the former can not be existed without the latter. Key words: harmonious essence; Jing-chu culture; huoguo; evolution language and culture Résumé: Le but de cet article est d'étudier la relation entre la langue et la culture à partir d’une perspective microscopique typique de l’essence harmonieuse de la culture des royaumes Jing et Chu dans l'évolution du dialecte "huoguo" (ou: «fatras») à partir de laquelle nous avons conclu que la langue et la culture sont si fortement influencés l’une par l’autre que la première ne peut pas exister toute seule sans la dernière. Mots-Clés: essence harmonieuse; la culture des royaumes Jing et Chu; huoguo; évolution de la langue et de la cultur

Women and Media: A Study on the Marginalization of Female Discourse Power

The mass media is the window for reflecting the mass ideology. The article makes a thorough analysis on the marginalization of female discourse power and studies the potential sexual discrimination of this phenomenon, regarding females as the subjects and the objects of the mass media, and then further traces its deep reason upon which many constructive suggestions and improved measures have been proposed. The article aims at awakening the masses to establish the correct sexual ideology in harmony and pursue the equality of discourse power between females and males. Key words: mass media; female discourse power; marginalization; sexual discriminationRésumé: Les médias de masse est la fenêtre pour refléter l'idéologie de la masse. Cet article fait une analyse approfondie sur la marginalisation du pouvoir du discours féminin et étudie la discrimination sexuelle inhérente à ce phénomène tandis que les femmes sont les sujets et les objets des médias de masse. Il explore en outre la raison profonde de ce phénomène sur laquelle des suggestions constructives et des mesures améliorées ont été proposées. L'article vise à l'éveil des masses à fin d'établir une idéologie sexuelle correcte et harmonieuse et de poursuivre l'égalité du pouvoir de discours entre les femmes et les hommes.Mots-Clés: médias de masse; pouvoir du discours féminin; marginalisation; discrimination sexuell