Polarization of Lambda and Anti-Lambda in 920 GeV Fixed-Target Proton-Nucleus Collisions
B Collaboration
Abstract
A measurement of the polarization of Lambda and Anti-Lambda baryons produced in pC and pW collisions at sqrt(s)=41.6 GeV has been performed with the HERA-B spectrometer. The measurements cover the kinematic range of 0.6 GeV/c < pT<1.2 GeV/c in transverse momentum and -0.15<xF<0.01 in Feynman-x. The polarization results from the two different targets agree within the statistical error. In the combined data set, the largest deviation from zero, +0.054 +- 0.029, is measured for xF < -0.07. Zero polarization is expected at xF=0 in the absence of nuclear effects. The polarization results for the Lambda agree with a parametrization of previous measurements which were performed at positive xF values, where the Lambda polarization is negative. Results of Anti-Lambda polarization measurements are consistent with zero.
Create a lesson
Related papers
Accelerating Optical Photon Simulation in DUNE with Opticks
Ilker Parmaksiz, Aaron Higuera, Laura Paulucci et al.
Search for high-mass resonances in photon-jet final states using 140 fb-1 of pp collisions at s = 13 TeV with the ATLAS detector
ATLAS Collaboration
Efficient binned profile likelihood minimization for precision measurements with RABBIT
David Walter, Josh Bendavid, Kenneth Long
A Weighting Method for Incorporating Mass Resolution Effects in Amplitude Analysis
Benhou Xiang, Wenqian Zheng, Hongxun Yang et al.
A High Performance Partial Wave Analysis Framework for Hadron Spectroscopy
Benhou Xiang, Shuangshi Fang, Beijiang Liu
Measurement of tZq inclusive and differential cross-sections in pp collisions at s = 13~TeV with the ATLAS detector
ATLAS Collaboration