We present the first measurement of the electron angular distribution parameter α2 in W → eν events produced in proton-antiproton collisions as a function of the W boson transverse momentum. Our analysis is based on data collected using the DØ detector during the 1994–1995 Fermilab Tevatron run. We compare our results with next-to-leading order perturbative QCD, which predicts an angular distri...

Article history: Received 26 October 2017 Received in revised form 21 November 2017 Accepted 22 November 2017 Available online 5 December 2017 Editor: W.-D. Schlatter This Letter presents the measurement of differential cross sections of isolated prompt photons produced in association with a b-jet or a c-jet. These final states provide sensitivity to the heavy-flavour content of the proton and ...

The PHENIX Experiment at the Relativistic Heavy Ion Collider has conducted a survey of fluctuations in charged hadron multiplicity in Au+Au and Cu+Cu collisions at √ sNN = 22, 62, and 200 GeV. A universal power law scaling for multiplicity fluctuations expressed as σ2/μ2 is observed as a function of Npart for all species studied that is independent of the transverse momentum range of the measur...

3 We present the rst measurement of the electron angular distribution parameter 2 in W ! ee events produced in proton-antiproton collisions as a function of the W boson transverse momentum. Our analysis is based on data collected using the DD detector during the 1994{1995 Fermilab Tevatron run. We compare our results with next-to-leading order perturbative QCD, which predicts an angular distrib...

We demonstrate a two-window heterodyne method for measuring the x-p cross correlation, ??(*)(x)? (p)?, of an optical field ? for transverse position x and transverse momentum p. This scheme permits independent control of the x and p resolution. A simple linear transform of the x-p correlation function yields the Wigner phase-space distribution. This technique is useful for both coherent and low...