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On 23rd November 2009, during the early commissioning of the CERN Large Hadron Collider (LHC), two counter-rotating proton bunches were circulated for the first time concurrently in the machine, at the LHC injection energy of 450 GeV per beam. Although the proton intensity was very low, with only one pilot bunch per beam, and no systematic attempt was made(More)
The production of π+, π−, K+, K−, p, and p at mid-rapidity has been measured in proton-proton collisions at √ s = 900 GeV with the ALICE detector. Particle identification is performed using the specific energy loss in the inner tracking silicon detector and the time projection chamber. In addition, time-of-flight information is used to identify hadrons at(More)
The production of mesons containing strange quarks (KS, φ) and both singly and doubly strange baryons ( , , and − + +) are measured at mid-rapidity in pp collisions at √ s = 0.9 TeV with the ALICE experiment at the LHC. The results are obtained from the analysis of about 250 k minimum bias events recorded in 2009. Measurements of yields (dN/dy) and(More)
The 48Ca Radius EXperiment (CREX) was conditionally approved at the C2 level by PAC39, which recommended that a stronger case be made demonstrating “how the 48Ca result will test microscopic models.” In order to evaluate the case, a workshop was held at Jefferson Lab in March 2013 [1] with leading theorists from several fields that have an interest in our(More)
ALICE (A Large Ion Collider Experiment) is an experiment optimized for the study of nucleus-nucleus collisions at a centre-of-mass energy of ~ 5.5 TeV per nucleon at the LHC (Large Hadron Collider) [1]. The central part of the experiment, in a 0.2T solenoidal field, consists of the Inner Tracking System (ITS), Time Projection Chamber (TPC) and Transition(More)
A new experimental apparatus, designed principally for a high sensitivity search for ! oscillation, has been successfully constructed and made operational by the CHORUS Collaboration for the CERN-WA95 experiment. It consists of a large emulsion target, a scintillating fiber tracker system with optoelectronics read-out, an air-core magnet, a set of trigger(More)
We present deeply virtual π^{0} electroproduction cross-section measurements at x_{B}=0.36 and three different Q^{2} values ranging from 1.5 to 2  GeV^{2}, obtained from Jefferson Lab Hall A experiment E07-007. The Rosenbluth technique is used to separate the longitudinal and transverse responses. Results demonstrate that the cross section is dominated by(More)
This is a follow-up measurement to PREX-I which ran in 2010 and demonstrated successful control of systematic errors and overcame many technical challenges, but which ran into difficulties with radiation and the vacuum system that reduced the running efficiency. PREX measures the parity-violating electroweak asymmetry in the elastic scattering of polarized(More)