7,798 research outputs found

    Amy D. Dooling and Kristina M. Torgeson, eds. Writing women in modern China : an anthology of women\u27s literature from the early twentieth century

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    This article reviews the book Writing Women in Modern China: An Anthology of Women\u27s Literature from the Early Twentieth Century edited by Amy D. Dooling and Kristina M. Torgeson

    Rapidity resummation for BB-meson wave functions

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    Transverse-momentum dependent (TMD) hadronic wave functions develop light-cone divergences under QCD corrections, which are commonly regularized by the rapidity ζ\zeta of gauge vector defining the non-light-like Wilson lines. The yielding rapidity logarithms from infrared enhancement need to be resummed for both hadronic wave functions and short-distance functions, to achieve scheme-independent calculations of physical quantities. We briefly review the recent progress on the rapidity resummation for BB-meson wave functions which are the key ingredients of TMD factorization formulae for radiative-leptonic, semi-leptonic and non-leptonic BB-meson decays. The crucial observation is that rapidity resummation induces a strong suppression of BB-meson wave functions at small light-quark momentum, strengthening the applicability of TMD factorization in exclusive BB-meson decays. The phenomenological consequence of rapidity-resummation improved BB-meson wave functions is further discussed in the context of B→πB \to \pi transition form factors at large hadronic recoil.Comment: 6 pages, 2 figures, Conference proceedings for the workshop of QCD@work, Giovinazzo (Italy), June 16-19, 201

    QCD corrections to B→πB \to \pi form factors from light-cone sum rules

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    We compute perturbative corrections to B→πB \to \pi form factors from QCD light-cone sum rules with BB-meson distribution amplitudes. Applying the method of regions we demonstrate factorization of the vacuum-to-BB-meson correlation function defined with an interpolating current for pion, at one-loop level, explicitly in the heavy quark limit. The short-distance functions in the factorization formulae of the correlation function involves both hard and hard-collinear scales; and these functions can be further factorized into hard coefficients by integrating out the hard fluctuations and jet functions encoding the hard-collinear information. Resummation of large logarithms in the short-distance functions is then achieved via the standard renormalization-group approach. We further show that structures of the factorization formulae for fBπ+(q2)f_{B \pi}^{+}(q^2) and fBπ0(q2)f_{B \pi}^{0}(q^2) at large hadronic recoil from QCD light-cone sum rules match that derived in QCD factorization. In particular, we perform an exploratory phenomenological analysis of B→πB \to \pi form factors, paying attention to various sources of perturbative and systematic uncertainties, and extract ∣Vub∣=(3.05−0.38+0.54∣th.±0.09∣exp.)×10−3|V_{ub}|= \left(3.05^{+0.54}_{-0.38} |_{\rm th.} \pm 0.09 |_{\rm exp.}\right) \times 10^{-3} with the inverse moment of the BB-meson distribution amplitude ϕB+(ω)\phi_B^{+}(\omega) determined by reproducing fBπ+(q2=0)f_{B \pi}^{+}(q^2=0) obtained from the light-cone sum rules with π\pi distribution amplitudes. Furthermore, we present the invariant-mass distributions of the lepton pair for B→πℓΜℓB \to \pi \ell \nu_{\ell} (ℓ=Ό ,τ\ell= \mu \,, \tau) in the whole kinematic region. Finally, we discuss non-valence Fock state contributions to the B→πB \to \pi form factors fBπ+(q2)f_{B \pi}^{+}(q^2) and fBπ0(q2)f_{B \pi}^{0}(q^2) in brief.Comment: 44 pages, 12 figure

    Towards a collaborative MRP for supply chain coordination

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    The necessity to increase collaboration in nowadays supply chains is emphasized both by academics and practitioners, but most of the supply chains are still managed through cascades of classical MRP/MRP2 systems. Interviews in the aeronautical sector have shown us the existence of many hidden practices aiming at satisfying local constraints which would be better addressed through collaborative processes. We suggest in this communication to define a "collaborative MRP" which would not only provide a better global performance than purely local planning, but take into account the autonomy of the involved partners which is not always respected by centralized pproaches using APS (Advanced Planning Systems)

    Reentrant phase transitions of higher-dimensional AdS black holes in dRGT massive gravity

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    We study the P−VP-V criticality and phase transition in the extended phase space of anti-de Sitter (AdS) black holes in higher-dimensional de Rham, Gabadadze and Tolley (dRGT) massive gravity, treating the cosmological constant as pressure and the corresponding conjugate quantity is interpreted as thermodynamic volume. Besides the usual small/large black hole phase transitions, the interesting thermodynamic phenomena of reentrant phase transitions (RPTs) are observed for black holes in all d≄6d\geq6-dimensional spacetime when the coupling coefficients cim2c_i m^2 of massive potential satisfy some certain conditions.Comment: 14 pages, several references are added, v2: published in EPJ

    Models for supply chain negotiation in collaborative relationships

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    Nowadays, firms are increasingly building collaborative relationships with their partners in order to improve the global performance of the supply chain in which they are involved. Such collaborative relationships require information exchange or share and negotiation. In this paper, we first formalize some practices of collaboration from case studies of the aeronautical area then suggest some models for negotiation, allowing a supply chain member to publish hidden constraints and share risks/costs in order to achieve a win-win situation

    MRP-based negotiation in customer-supplier relationship

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    In the present uncertain context, increasing the performance of the supply chains requires to define cooperative processes between partners aiming at providing a better answer to the final customer, with a risk shared between partners. Based on an analysis of real practices, we suggest in this communication to take the MRP process as a basis for defining what could be such a cooperative process
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