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Measurements of transverse spin effects in the forward region with the STAR detector | | L. Nogach
; STAR collaboration
; | | Date: |
23 Nov 2009 | | Abstract: | Measurements by the STAR collaboration of the cross section and transverse
single spin asymmetry (SSA) of neutral pion production at large Feynman x (x_F)
in pp-collisions at sqrt{s}=200 GeV were reported previously. The x_F
dependence of the asymmetry can be described by phenomenological models that
include the Sivers effect, Collins effect or higher twist contributions in the
initial and final states. Discriminating between the Sivers and Collins effects
requires one to go beyond inclusive pi^0 measurements. For the 2008 run,
forward calorimetry at STAR was significantly extended. The large acceptance of
the Forward Meson Spectrometer (FMS) allows us to look at heavier meson states
and pi^0-pi^0 correlations. Recent results, the status of current analyses
and near-term plans will be discussed. | | Source: | arXiv, 0911.4388 | | Services: | Forum | Review | PDF | Favorites | |
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