Scalar and higher even spin glueball masses from an anomalous modified holographic model

In this work, within an anomalous modified holographic softwall model, we calculate analytically the masses of the scalar glueball with its radial excitations and higher even glueball spin states, with $P=C=+1$, from a single mass equation. Using this approach we achieved an unified treatment for both scalar and high even spin glueballs masses. Furthermore, we also obtain the Regge trajectory associated with the pomeron compatible with other approaches.Comment: V4: 14 pages, 3 tables, 1 figure. Text improved. New references included. Typos corrected. Results slightly modified due to the improvement of the statistical analysis. This version matches the published one in EP

Hipersensibilidade dentinária

A hipersensibilidade dentinária é uma condição clinica cada vez mais comum, caracterizada por uma dor aguda de inicio rápido e curta duração, como consequência da exposição dentinária a vários estímulos. A intervenção clínica face à sintomatologia implica o controlo dos factores etiológicos, associado a um aporte de agentes que permitam a obliteração dos túbulos dentinários ou o bloqueio de transmissão do estímulo doloroso. Em caso de insucesso, as opções de tratamento serão gradativamente mais complexas e invasivas. O objetivo desta revisão, foi de rever os dados mais recentes da literatura sobre as diferentes opções de abordagem preventiva/terapêutica da hipersensibilidade dentinária, tendo sido realizada uma pesquisa em bases de dados como a PubMed, Medline e Scielo. Os resultados dos estudos sobre a eficácia dos diferentes agentes/formulações não são consensuais, o que impossibilita a validação de protocolos clínicos de aplicação, estando no entanto comprovados os seus benefícios no controlo da hipersensibilidade dentinária.Dentin hypersensitivity is an increasingly common clinical condition characterized by a short and sharp pain, as a consequence of dentin and tubular exposure to several stimuli. Clinical intervention in relation to symptomatology implies the control of the etiological factors, associated with a contribution of agents that allow the obliteration of the dentinal tubules or the blockage of painful stimulus transmition. In case of failure, the treatment options will be gradually more complex and invasive. The objective of this review was to revise the most recent data from the literature on the different options of preventive/therapeutic approach of dentin hypersensitivity. For such, a research was done in databases such as PubMed, Medline and Scielo. The results of studies on the efficacy of the different agents/formulations are not consensual, which makes it impossible to validate clinical application protocols, however its benefits in the control of dentine hypersensitivity are proven

EDWARD ELGAR’S EXTENDED TONAL PROCEDURES—AN INQUIRY INTO ELGAR’S CHROMATIC REALM

This study aims to examine the ways in which English composer Edward Elgar (1857–1934) expanded common-practice tonality; it shows how Elgar employed harmonic structures and syntax in an innovative manner through specific extended-tonal techniques such as the use of chromatic-third relations (both harmonically and as a tonal plan), harmonic substitutions, and local ambiguous sonorities that at times lead to tonal ambiguity. The system that Elgar expanded upon has been called “Classical diatonic tonality”, which was extended when late nineteenth-century composers such as Elgar infused their music with chromaticism. Through an investigation of Elgar’s extended tonal techniques one can come to a better appreciation of his late nineteenth-century harmonic vocabulary. It has been well documented that Elgar modeled his music after that of Wagner and his Germanic contemporaries (from Mendelssohn to Brahms), so that the Elgarian tonal language is one possible projection of a post-Wagnerian extended-tonal discourse. The discussion presented here will survey those parts of Elgar’s tonal language that he learned from his Germanic contemporaries, thereby establishing the context for his own unique chromatic compositional style. This study of Elgar’s work therefore further represents a study of the broader impact of post-Wagnerian chromaticism on late nineteenth-century English extended tonality

Holographic Description of Chiral Symmetry Breaking in a Magnetic Field in 2+1 Dimensions with an Improved Dilaton

We consider a holographic description of the chiral symmetry breaking in an external magnetic field in $(2+1)$-dimensional gauge theories from the softwall model using an improved dilaton field profile given by $\Phi(z) = - kz^2 + (k+k_1)z^2\tanh (k_{2}z^2)$. We find inverse magnetic catalysis for $BB_c$, where $B_c$ is the pseudocritical magnetic field. The transition between these two regimes is a crossover and occurs at $B=B_c$, which depends on the fermion mass and temperature. We also find spontaneous chiral symmetry breaking (the chiral condensate $\sigma \not=0$) at $T=0$ in the chiral limit ($m_q\to 0$) and chiral symmetry restoration for finite temperatures. We observe that changing the $k$ parameter of the dilaton profile only affects the overall scales of the system such as $B_c$ and $\sigma$. For instance, by increasing $k$ one sees an increase of $B_c$ and $\sigma$. This suggests that increasing the parameters $k_1$ and $k_2$ will decrease the values of $B_c$ and $\sigma$.Comment: V2: 13 pages, 10 figures. New figure added. Text improved. Typos corrected. New references added. Results unchanged. This version matches the published one in EP