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Letters in High Energy Physics最新文献

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Joule-Thomson Expansion of Reissner-Nordstrom AdS Black Holes in $f(R)$ gravity 重力下Reissner-Nordstrom AdS黑洞的焦耳-汤姆逊膨胀
Letters in High Energy Physics Pub Date : 2018-04-16 DOI: 10.31526/LHEP.2.2018.02
M. Chabab, High Energy, H. E. Moumni, S. Iraoui, K. Masmar, S. Zhizeh
{"title":"Joule-Thomson Expansion of Reissner-Nordstrom AdS Black Holes in $f(R)$ gravity","authors":"M. Chabab, High Energy, H. E. Moumni, S. Iraoui, K. Masmar, S. Zhizeh","doi":"10.31526/LHEP.2.2018.02","DOIUrl":"https://doi.org/10.31526/LHEP.2.2018.02","url":null,"abstract":"In this paper, we study Joule-Thomson expansion for charged AdS black holes in (f(R)) gravity. We obtain the inversiontemperatures as well as inversion curves, and investigate similarities and differences between van der Waals fluidsand charged AdS black holes in (f(R)) gravity for this expansion.In addition, we determine the position of the inversion point versus different values ofthe mass (M), the charge (Q) and the parameter (b) for such black hole. At this point, the Joule-Thomson coefficient (mu) vanishes, an import feature that we used to obtain the cooling-heating regions by scrutinizing the sign of the (mu) quantity.","PeriodicalId":36085,"journal":{"name":"Letters in High Energy Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47854395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 27
Dark $SU(2)$ Antecedents of the $U(1)$ Higgs Model $U（1）$Higgs模型的Dark$SU（2）$Antecents
Letters in High Energy Physics Pub Date : 2018-04-02 DOI: 10.31526/LHEP.2.2018.03
E. Ma
{"title":"Dark $SU(2)$ Antecedents of the $U(1)$ Higgs Model","authors":"E. Ma","doi":"10.31526/LHEP.2.2018.03","DOIUrl":"https://doi.org/10.31526/LHEP.2.2018.03","url":null,"abstract":"The original spontaneously broken U(1) gauge model with one complex Higgs scalar field has been known in recent years as a possible prototype dark-matter model. Its antecedents in the context of SU(2) are discussed. Three specific examples are described, with one dubbed \"quantum scotodynamics\".","PeriodicalId":36085,"journal":{"name":"Letters in High Energy Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46977251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Search for more sensitive observables to charged scalar in $B rightarrow D^{(*)}taunu_{tau}$ decays. 在$B rightarrow D^{(*)}taunu_{tau}$衰变中寻找对带电标量更敏感的可观测物。
Letters in High Energy Physics Pub Date : 2017-03-31 DOI: 10.31526/LHEP.2.2019.108
L. Dhargyal
{"title":"Search for more sensitive observables to charged scalar in $B rightarrow D^{(*)}taunu_{tau}$ decays.","authors":"L. Dhargyal","doi":"10.31526/LHEP.2.2019.108","DOIUrl":"https://doi.org/10.31526/LHEP.2.2019.108","url":null,"abstract":"It has been known that $B rightarrow D^{(*)} tau nu_{tau}$ are good observables in the search for the charged Higgs. The recent obervation of deviation from standard-model by almost 4$sigma$ by Babar, Belle and LHCb in $R(D^{(*)})$ revived the interest in possible signal of presence of charged Higgs in these modes. But such a large deviation in the rates, where standard-model has tree level contribution, coming from a charged Higgs alone is highly unlikely. However these decay modes are good probes to search for small charged Higgs signal if we can construct sensitive observables in these modes. In this work we would like to propose four new observables which shows much more sensitivity to the presence of charged Higgs than the usual observables such as $A_{lambda}^{D^{(*)}}$ and $A_{theta}^{D^{(*)}}$. These four observable are (1) $frac{1}{A_{lambda}^{D}}$, (2) $Y_{1}(q^{2}) = frac{A^{D}_{theta}}{A^{D}_{lambda}}$, (3) $Y_{2}(q^{2}) = frac{dGamma(B rightarrow D^{*}taunu_{tau})}{dGamma_{D}(lambda_{tau}=+1/2) - dGamma_{D}(lambda_{tau}=-1/2)}$ and (4) $Y_{3}(q^{2}) = (frac{q^{2}}{m^{2}_{tau}})(A^{D}_{lambda} + 1)frac{1}{A^{D}_{lambda}}$.","PeriodicalId":36085,"journal":{"name":"Letters in High Energy Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41699929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Full angular spectrum analysis of tensor current contribution to $A_{cp}(tau rightarrow K_{s} pi nu_{tau})$. 张量电流贡献的全角谱分析$A_{cp}(tau rightarrow K_{s} pi nu_{tau})$。
Letters in High Energy Physics Pub Date : 2016-05-02 DOI: 10.31526/LHEP.3.2018.03
L. Dhargyal
{"title":"Full angular spectrum analysis of tensor current contribution to $A_{cp}(tau rightarrow K_{s} pi nu_{tau})$.","authors":"L. Dhargyal","doi":"10.31526/LHEP.3.2018.03","DOIUrl":"https://doi.org/10.31526/LHEP.3.2018.03","url":null,"abstract":"Babar collaboration has reported an intriguing opposite sign in the integrated decay rate asymmetry $A_{cp}(tau rightarrow K_{s} pi nu_{tau})$ than that of SM prediction from the known $K^{0}$ - $bar{K^{0}}$ mixing. Babar's result deviate from the SM prediction by about 2.7$sigma$. If the result stands with higher precision in the future experiments, the observed sign anomaly in the $A_{cp}(tau rightarrow K_{s} pi nu_{tau})$ can most likely come only from a NP. In this work we present a full angular spectrum analysis on the contribution to $A_{cp}(tau rightarrow K_{s} pi nu_{tau})$ coming from the tensorial term. Assuming the real part of the NP tensorial coupling is negligible compare to its imaginary part and with $A_{cp}(tau rightarrow K_{s} pi nu_{tau})$ and $Br(tau rightarrow K_{s} pi nu_{tau})$ as data points to fit the imaginary part of the NP coupling, we have been able to fit the result within 1$sigma$ of the experimental values.","PeriodicalId":36085,"journal":{"name":"Letters in High Energy Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69996545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
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