A multi-workstation for use in a work area of a garage having a vertically oriented pole with an upper end and a lower end and a light fixture mounted between the upper end and the lower end of the vertically oriented pole. The light fixture is capable of sliding up and down along the pole, rotating about an axis that is perpendicular to the axis of the pole, moving horizontally toward and away from the pole, and rotating about an axis that is perpendicular to the axis of the pole. Locking means is provided to lock the light fixture at a desired height and angle relative to the pole and mounting means is provided to hold the pole in a vertical position.

Significant enhancements of J/psi production at very low transverse momenta were recently observed by the ALICE and STAR collaborations in peripheral hadronic A+A collisions. The anomalous excess points to coherent photon-nucleus interactions in violent hadronic heavy-ion collisions, which were conventionally studied only in ultra-peripheral collisions. Assuming that the coherent photoproduction is the underlying mechanism responsible for the excess observed in peripheral A+A collisions, its contribution in p+p collisions with nuclear overlap, i.e. nonsingle-diffractive collisions, is of particular interest. In this paper, we perform a calculation of exclusive J/psi photoproduction in non-single-diffractive p+p collisions at the RHIC and LHC energies based on the pQCD motivated parametrization using the world-wide experimental data, which could be further employed to improve the precision of the phenomenological calculations for photoproduction in A+A collisions. The differential rapidity and transverse momentum distributions of J/psi from photoproduction are presented. In comparison with the J/psi production from hadronic interactions, we find that the contribution of photoproduction is negligible.

Let p(1),..., p(n) be positive real numbers. It is well known that for every r < 0 the matrix [(p(i) + p(j))(r)] is positive definite. Our main theorem gives a count of the number of positive and negative eigenvalues of this matrix when r > 0. Connections with some other matrices that arise in Loewner's theory of operator monotone functions and in the theory of spline interpolation are discussed.