5,923 research outputs found

    Black hole solutions of dimensionally reduced Einstein-Gauss-Bonnet gravity with a cosmological constant

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    We study the phase space of the spherically symmetric solutions of the system obtained from the dimensional reduction of the six-dimensional Einstein-Gauss-Bonnet action with a cosmological constant. We show that all the physical solutions have anti-de Sitter asymptotic behavior.Comment: 13 pages, plain Te

    Phenomenology of Sivers Effect with TMD Evolution

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    Following the TMD evolution scheme recently proposed for the unpolarized and the Sivers distribution function, we propose a simple strategy to take into account this TMD Q^2 dependence in our phenomenological extraction of the Sivers function from SIDIS data. New results are presented and possible future applications are discussed.Comment: Contribution to the Proceedings of the XX International Workshop on Deep-Inelastic Scattering and related subjects (DIS2012), 26-30 March 2012, Bonn, Germany. One figure correcte

    Relevansi Peran Gender dan Kontribusi Ekonomi Perempuan untuk Mencapai Falah dalam Rumah Tangga

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    Talking about economic actors, it can be said that everyone will do economic activities. Nothing limitations on men and women, all doing economic activity. But not in all economic sectors women and men experience equality, both in opportunity and outcome of development. There is always and there is a gap in it. Just as there is in an economic household there will always be a gender gap. But the end of economic activity undertaken by economic households is to achieve prosperity or falah. Based on this it will be seen that there is a relationship or relevance between gender and also economic contribution in terms of reaching falah for household economic

    Pemikiran Tokoh Ekonomi Muslim: Imam Al-Syatibi

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    Ekonomi Islam sebagai ekonomi didasarkan atas sumber hukum Islam; Al-Qur'an dan Al-Hadits.Keadaan ini menjadikan ekonomi Islam mempunyai karakter sendiri dalam definisi, prinsip, sistem, aturan dan praktek.Melalui USAha untuk menafsirkan Al-Qur'an dan Al-Hadits ini yang menjadikan ekonomi Islam berbeda dengan ekonomi konvensional.Di samping itu, ekonomi Islam bisa berarti suatu ilmu yang dasar hukumnya berbeda dengan ekonomi konvensional.Dari sumber hukum ini yang menyebabkan ilmu ekonomi ini disebut “ekonomi Islam”. Banyak ekonom muslim yang mendefinisikan dan mengeksplor ruang lingkup ekonomi Islam, diantaranya adalah Al-Syatibi. Al-Syatibi mempunyai pemikiran sendiri mengenai ekonomi Islam dan mempunyai konsep sendiri tentang ekonomi Islam. Menurutnya dalam ekonomi Islam itu terdapat maqashid syariah yang terdiri dari dharuriyat, hajjiyat dan  tahsiniyat. Selain itu Al-Syatibi juga mempunyai konsep sendiri mengenai objek kepemilikan dan pajak. &nbsp

    Partonic Transverse Motion in Unpolarized Semi-Inclusive Deep Inelastic Scattering

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    We analyse the role of partonic transverse motion in unpolarized Semi-Inclusive Deep Inelastic Scattering (SIDIS) processes. Imposing appropriate kinematical conditions, we find some constraints which fix an upper limit to the range of allowed kt values and lead to interesting results, particularly for some observables like the azimuthal modulation of the unpolarized SIDIS cross section and the average transverse momentum of the final, detected hadron.Comment: To appear in the Proceedings of the XIX International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS 2011), April 11-15, 2011, Newport News, VA US

    Transverse single-spin asymmetries in proton-proton collisions at the AFTER@LHC experiment in a TMD factorisation scheme

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    The inclusive large-pTp_T production of a single pion, jet or direct photon, and Drell-Yan processes, are considered for proton-proton collisions in the kinematical range expected for the fixed-target experiment AFTER, proposed at LHC. For all these processes, predictions are given for the transverse single-spin asymmetry, ANA_N, computed according to a Generalised Parton Model previously discussed in the literature and based on TMD factorisation. Comparisons with the results of a collinear twist-3 approach, recently presented, are made and discussed.Comment: RevTex4, 12 pages, 36 eps figures. V2: Few paragraphs and comments added. Several references added. Results unchanged. Matches the published versio

    Constraints on Gluon Sivers Distribution from RHIC Results

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    We consider the recent RHIC data on the transverse single spin asymmetry (SSA) A_N, measured in p(transv. polarized) p --> pion X processes at mid-rapidity by the PHENIX Collaboration. We analyze this experimental information within a hard scattering approach based on a generalized QCD factorization scheme, with unintegrated, transverse momentum dependent (TMD), parton distribution and fragmentation functions. In this kinematical region, only the gluon Sivers effect could give a large contribution to A_N; its vanishing value is thus used to give approximate upper limits on the gluon Sivers function (GSF). Additional constraints from the Burkardt sum rule for the Sivers distributions are also discussed.Comment: LaTeX 2e, 4 pages, 2 ps figures, uses aipproc.cls. Talk delivered by U. D'Alesio at the "17th International Spin Physics Symposium", SPIN2006, October 2-7, 2006, Kyoto, Japa
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