2,292 research outputs found

    A general formalism for single and double spin asymmetries in inclusive hadron production

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    We present a calculation of single and double spin asymmetries for inclusive hadron production in hadronic collisions. Our approach is based on Leading Order (LO) perturbative QCD and generalized factorization theorems, with full account of intrinsic parton momentum, k_T, effects. This leads to a new class of spin and k_T-dependent distribution and fragmentation functions. Limiting ourselves to consider leading twist functions, we show how they could play a relevant role in producing non-vanishing spin asymmetries.Comment: LaTeX, 8 pages, uses ws-procs9x6.cls. Talk delivered by S. Melis at the ``X Convegno su Problemi di Fisica Nucleare Teorica'', October 6-9, 2004, Cortona, Ital

    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

    Staging precariousness: The Serpica Naro catwalk during the Milan Fashion Week

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    The article illustrates the Italian process of work precarisation and the collective resistance of precarious workers. It interprets them in terms of the birth of a collective identity that conducts a critique against precariousness while developing learning resources. Through discursive analysis of the Serpica Naro catwalk, organised in the area of Milan by the activists of the May Day Parade and the San Precario network, the article illustrates the process of construction of this collective identity that uses irony and playfulness to resist and denounce precarious working conditions. The purpose is to interpret the anti-precariousness movement as a process of critical urban learning that creates the viability of spaces for resistance in metropolitan contexts

    Imagine being asked to evaluate your CEO …: Using the constructive controversy approach to teach gender and management in times of economic crisis

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    This article addresses the relationship between gender and management as intertwined discursive practices. Following a constructive controversial approach, we proposed to the students to complete a short story in which they have to give a feedback either to a fictitious female or to a male boss. The article has a dual aim since it offers a reflection on a teaching methodology suited to foster critical thinking in the classroom and analyzes the narratives so produced in search of what constitutes the students’ idea of “good management.” In positioning men/women CEO within a narrative, students enact a moral order that evaluates management in society. Their narratives reveal how the economic crisis has undermined the positive image of the male manager, while femaleness is emphasized for its anti-managerial imaginary. Moreover, the idea of what constitutes “good management” is constructed around an idea of care for both male and female CEOs

    What makes a “good manager”? Positioning gender and management in students’ narratives

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    The purpose of this paper is to address the relationships between gender and management in the narratives of students. More specifically, the authors discuss how the discourse on management is mobilized as a discursive practice able to make some form of that activity thinkable and practicable: who can be a CEO? What kind of managerial competencies are attributed to men/women CEOs? What kind of moral order is expressed in the stories told? Design/methodology/approach – Stimulus texts have been used to elicit narratives. Students were asked to complete a short story regarding a fictive managerial character, either female or male, whose performance and attitude they were asked to evaluate. Findings – The paper discusses how the collected stories as a whole expressed a conception of what counts as a “good manager” and how management is gendered. In the analysis, the authors discuss whether and how the relationships between gender and management are changing, or the basic assumptions about “think manager-think male” are still valid. The paper illustrates a traditional positioning of gendered management along the lines of rationality vs care, and a third positioning in which the ideal of the “good manager” has both competencies. Originality/value – The authors designed an alternative research strategy focused on how gender and management are discursively constructed within a context of economic crisis that affects management reputation. Particularly, the authors discuss the surprising results concerning how the written stories evaluating male CEOs distrusted the masculine way of managing and positioned the female managing style within a trustworthy context

    General helicity formalism for Single and Double Spin Asymmetries in p p --> pion + X

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    We consider within a generalized QCD factorization approach, the high energy inclusive polarized process p p --> pion + X, including all intrinsic partonic motions. Several new spin and k_T-dependent soft functions appear and contribute to cross sections and spin asymmetries. We present here formal expressions for transverse single spin asymmetries and double longitudinal ones. The transverse single spin asymmetry, A_N, is considered in detail, and all contributions are evaluated numerically. It is shown that the azimuthal phase integrations strongly suppress most contributions, leaving at work mainly the Sivers effect.Comment: LaTeX, 5 pages, 1 eps figure, uses epsfig, wrapfig. Talk delivered by S. Melis at the ``XI Workshop on High Energy Spin Physics'', SPIN 05, September 27 - October 1, 2005, Dubna, Russi

    Helicity Formalism and Spin Asymmetries in Hadronic Processes

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    We present a generalized QCD factorization scheme for the high energy inclusive polarized process, (A, S_A) + (B, S_B) -> C + X, including all intrinsic partonic motions. This introduces many non-trivial azimuthal phases and several new spin and k_T dependent soft functions. The formal expressions for single and double spin asymmetries are discussed. Numerical results for A_N[p(transv. polarized) p -> pi + X] are presented.Comment: 8 pages, 4 ps figures, uses ws-procs9x6.cls and rotating_pr.sty (included). Talk delivered by F. Murgia at the "International Workshop on Transverse Polarisation Phenomena in Hard Processes" (TRANSVERSITY 2005), September 7-10 2005, Como, Ital
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