35,494 research outputs found

    Top and Bottom Squarks Decays under Cosmological Bounds

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    We investigate the fermionic decays of top squarks tilde t_{1,2} and bottom squarks tilde b_{1,2}$ in the Minimal Supersymmetric Standard Model with complex parameters M_1, mu, A_t and A_b . In the analysis we particularly take into account the cosmological bounds imposed by WMAP data. We plot the CP phase dependences of stop and sbottom decay widths.Comment: 1 text(9 pages)and 8 figures(6 pages). Total 15 pages. Accepted to be published in Phys.Lett.

    Implications of Supersymmetry Phases for Higgs Boson Signals and Limits

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    We study the supersymmetry parameter region excluded if no Higgs is found at LEP, and the region allowed if a Higgs boson is found at LEP. We describe the full seven parameter structure of Higgs sector. When supersymmetry phases are included, tanβ\tan \beta greater than or equal to 2 is always allowed, and the lower limit on lightest Higgs mass if no signal is found is about 20% lower than in the Standard Model and about 10% lower than in the MSSM with phases set to 0, π\piComment: 11 papges, 2 figure

    The Higgs masses and explicit CP violation in the gluino-axion model

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    In this work, we adress the phenomenological consequences of explicit CP violation on direct Higgs-boson searches at high energy colliders. Having a restricted parameter space, we concentrate on the recently proposed gluino-axion model, and investigate the CP violation capability of the model subject to the recent experimental data. It is shown that the Higgs masses as well as their CP compositions are quite sensitive to the supersymmetric CP phases. The lightest Higgs is found to be nearly CP even to a good approximation whilst the remaining two heavy scalars do not have definite CP parities.Comment: 20 pp, 14 eps figs, title is changed, the manuscript is improved using the latest experimental data, some figures and references adde

    Different Interpretations of Abū Ḥanīfa: the Ḥanafī Jurists and the Ḥanafī Theologians

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    Since the spread of Islam in Transoxiana (Mā-warāʾ al-Nahr), religious understandings based on the opinions of Abū Ḥanīfa (d. 150/767) have always been dominant in the region. Therefore, it was not possible for other understandings, which may seem to be opposite to Abū Ḥanīfa’s opinions, to be influential in the region. That Najjāriyya and Karrāmiyya could not be perennial in the region may be an example of this case. Similarly, Māturīdiyya, which benefited from Abū Ḥanīfa’s treatises of creed and his rational method, could not adequately get the support of people at the time of Abū Manṣūr al-Māturīdī (d. 333/944) and Abū l-Muʿīn al-Nasafī (d. 508/1114) because the school was seen as an opposite approach to the prevailing imaginations about Abū Ḥanīfa. Moreover, the Ḥanafī jurists (Ḥanafī fuqahāʾ), who were influential in not only people but also bureaucracy, and the Ḥanafī theologians (Ḥanafī mutakallimūn), who followed al-Māturīdī’s theological method , did not come to terms on their interpretations of Abū Ḥanīfa. The Ḥanafī jurists who benefited mostly from juridical sources and manāqibworks were thinking different from the Ḥanafī theologians who relied on the treatises of Abū Ḥanīfa on such issues as the legitimacy of Kalām as a scholarly discipline, the responsibility of people of fatra(ahl al-fatra: people having no access to the message of Islam), and the creation of faith (īmān). The Ḥanafī jurists took different stance on various issues and argued that faith is not created; the informative (khabarī) attributes of God (ṣifāt Allāh) mentioned in the Qurʾān cannot be interpreted (taʾwīl); no one can be held accountable for faith only based on the intellect unless the message of the Prophet reaches to her or him; the people of fatracannot be responsible for faith. They also stated that Abū Ḥanīfa broke his relationship with the theological (kalāmī) issues in the last years of his life. Although these jurists accepted Abū Ḥanīfa’s distinction between faith and deeds and his view of the stability of one’s faith without increasing or decreasing they condemned theological discussions on these issues by going beyond the limits of the treatise of creed. While the Ḥanafī theologians known as the Ḥanafī scholars of Samarqand who adopted the religious views of Imām al-Māturīdī of Samarqand acknowledged the intellect and considered it as an independent source in religion, the Ḥanafī jurists known as the Ḥanafī scholars of Bukhārāauthorized the intellect only in understanding the transmission (naql) and its interpretation. The different opinions of the two groups can be seen clearly on the question of the religious responsibility of the people of fatra. When we look at the debates regarding Kalām and the Islamic law, we can see that the difference between these two cities (Samarqand and Bukhārā) stems from their methodological views on the epistemological values of the reason (ʿaql) and the transmission (tradition). Māturīdiyya is a school of theology established by the Ḥanafī theologians who upheld the necessity and significance of Kalām. It is possible to say that the Ḥanafī jurists did not contribute to the establishment and systematisation of this school; rather, they tried to prevent it. Our findings show that the Ḥanafī jurists who lived in Transoxiana differ from each other because of their different understandings of Abū Ḥanīfa. In the historical process extending today it is evident that the religious views of the Ḥanafī jurists and their interpretation of Abū Ḥanīfa have been prominent and effective, not that of Māturīdiyya, which is the understanding of the Ḥanafī theologians

    The examination of how modern, overeducated and intellectual men are alienated from their environment of materialistic values of the Modern Era, with regard to the poem “The Love Song of J. Alfred Prufrock” by T.S. Elliot.

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    An intellectual man eventually questions the deviations in his society and he is usually astounded by how he is obliged to stand alone in that society. This work specifically focuses on how the shattered values of Modern World lead the intellectual individual to alienation and suffering, with regard to the poem “The Love Song of J. Alfred Prufrock” by T.S. Elliot. The given imageries, stylistic devices, meanings and some certain references are examined as well, as indications of the suffering of the individual. The essay also includes the historical and social background of American Literature of twentieth century and stresses the relation between the mentioned factors and the attitude of modern men. After World War I, the artistic approach of some certain writers of the mentioned era has been mainly affected by the social changes. The main aim is to study how these changes influenced the poetry of T.S. Elliot; more specifically investigate the indications of that certain state of mind embedded in “The Love Song of J. Alfred Prufrock”. As a focus, the research question of this essay suggests concentrating on the topic by taking major themes, linguistics, structures, tone, atmosphere and setting of the poem into consideration. All the mentioned points are discussed in a detailed way in order to determine and comprehend the state of endurance and alienation of modern man. With the help of stylistic devices, language and themes he uses, Elliot demonstrates how he is distressful about the materialistic values of the Modern Era, as well as his personal suffering

    Growth under Exchange Rate Volatility: Does Access to Foreign or Domestic Equity Markets Matter?

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    Employing a matched employer-employee dataset, this paper explores the effects of exchange rate volatility on the growth performances of domestic versus foreign, and publicly traded versus non-traded private manufacturing firms in a major developing country, Turkey. The empirical results using dynamic panel data estimation techniques and comprehensive robustness tests suggest that exchange rate volatility has a significant growth reducing effect on manufacturing firms. However, having access to foreign, and to a lesser degree, domestic equity markets is found to reduce these negative effects at significant levels. These findings continue to hold after controlling for firm heterogeneity due to differences in export orientation, external indebtedness, profitability, productivity, size, industrial characteristics, and time-variant institutional changes

    Higgs-strahlung in Abelian Extended Supersymmetric Standard Model

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    We analyze the Higgs production via the Higgs-strahlung process e+ehkl+le^{+}e^{-}\to h_{k}{\it{l}}^{+}{\it{l}}^{-} in an Abelian Extended Supersymmetric SM. We work in the large Higgs trilinear coupling driven minimum of the potential, and find that the next-to-lightest Higgs cannot be produced by this process. Other Higgs scalars, namely the lightest and the heaviest, have cross sections comparable to that in the pure SM. It is found that the present model has observable differences with the other popular model, NMSSM, in the same type of minimum.Comment: 12 pages, 2 postscript figures. To appear in Phys. Lett.

    Symmergent Gravity, Seesawic New Physics, and their Experimental Signatures

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    The standard model of elementary particles (SM) suffers from various problems, such as power-law ultraviolet (UV) sensitivity, exclusion of general relativity (GR), and absence of a dark matter candidate. The LHC experiments, according to which the TeV domain appears to be empty of new particles, started sidelining TeV-scale SUSY and other known cures of the UV sensitivity. In search for a remedy, in this work, it is revealed that affine curvature can emerge in a way restoring gauge symmetries explicitly broken by the UV cutoff. This emergent curvature cures the UV sensitivity and incorporates GR as symmetry-restoring emergent gravity ({\it symmergent gravity}, in brief) if a new physics sector (NP) exists to generate the Planck scale and if SM+NP is fermi-bose balanced. This setup, carrying fingerprints of trans-Planckian SUSY, predicts that gravity is Einstein (no higher-curvature terms), cosmic/gamma rays can originate from heavy NP scalars, and the UV cutoff might take right value to suppress the cosmological constant (alleviating fine-tuning with SUSY). The NP does not have to couple to the SM. In fact, NP-SM coupling can take any value from zero to ΛSM2/ΛNP2\Lambda^2_{SM}/\Lambda^2_{NP} if the SM is not to jump from ΛSM500GeV\Lambda_{SM}\approx 500\, {\rm GeV} to the NP scale ΛNP\Lambda_{NP}. The zero coupling, certifying an undetectable NP, agrees with all the collider and dark matter bounds at present. The {\it seesawic} bound ΛSM2/ΛNP2\Lambda^2_{SM}/\Lambda^2_{NP}, directly verifiable at colliders, implies that: {\it (i)} dark matter must have a mass ΛSM\lesssim \Lambda_{SM}, {\it (ii)} Higgs-curvature coupling must be 1.3%\approx 1.3\%, {\it (iii)} the SM RGEs must remain nearly as in the SM, and {\it (iv)} right-handed neutrinos must have a mass 1000TeV\lesssim 1000\, {\rm TeV}. These signatures serve as a concise testbed for symmergence.Comment: 32 pages, 6 figures, 1 table. v3: Added a new section, new references and a figure; Reorganized sections; Journal versio

    Effects of Curvature-Higgs Coupling on Electroweak Fine-Tuning

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    It is shown that, nonminimal coupling between the Standard Model (SM) Higgs field and spacetime curvature, present already at the renormalizable level, can be fine-tuned to stabilize the electroweak scale against power-law ultraviolet divergences. The nonminimal coupling acts as an extrinsic stabilizer with no effect on the loop structure of the SM, if gravity is classical. This novel fine-tuning scheme, which could also be interpreted within Sakharov's induced gravity approach, works neatly in extensions of the SM involving additional Higgs fields or singlet scalars.Comment: 11 pp. Added reference