[PDF] Top 20 Recent results from the COMPASS hadron program

... should manifest itself in a decreasing ratio R of the measured cross section over the simulated cross section for a point-like particle towards higher x γ (see figure 8(b), see [6] for more details on the data selection ... See full document

... physics program allowing to test fundamental symmetries of nature, search for processes beyond the Standard Model (SM), study rare meson decays and perform precise measurements in hadron ... See full document

... Taking into account the onset of deconfinemet that is well defined in central Pb + Pb col- lisions (although its presence in the light systems also, in particular, inelastic p + p interac- tions is questionable) one can ... See full document

... NA61 / SHINE experiment [16] (see Sec. 2) has pro- vided a number of particle production and cross section measurements which are relevant for the modeling of hadronic interaction in EAS (e.g. Refs [17, 18]). In this ... See full document

... acceptance hadron spectrometer with excellent capabilities in charged particle momentum measurements and identification by a set of five Time Projection Chambers as well as Time-of-Flight ...secondary ... See full document

... Hadron production cross-section in the deep inelastic scattering regime is dominated by three sub- processes at LO: the leading process LP (photoabsoption by a quark), the QCD Compton QCDC (gluon radiation by a ... See full document

... used. Results for the pion fragmentation functions (not shown here) agree well with the most recent NLO fits [15, ...the results for the D f av and D un f are presented in figure ... See full document

... Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory is one of the biggest operating particle accelerators designed to study heavy ion collisions at high energies. RHIC is a flexible and reliable ... See full document

... The COMPASS experiment at the CERN-SPS studies the spectrum and the structure of hadrons by scattering high energy hadrons and polarised muons off various fixed ...targets. Recent results for the ... See full document

... The COMPASS fixed-target experiment is a facility to study QCD, covering a large range in momen- tum transfer from larger than 1 GeV 2 / c 2 down to smaller than 10 −3 GeV 2 / c 2 ...of hadron ... See full document

... comprehensive program of measuring various hard processes in a broad kinematic range, in particular Deeply Virtual Compton Scattering ...and results of a recent phenomenological studies and ... See full document

... neutrino results in a muon that at an energy around 1 TeV has path lengths in water of the order of a few kilometers, providing a long lever arm for direction ... See full document

... The top quark mass was measured in single top events [8], where the W boson decays to muon and a neutrino. Specific event topology and kinematics, featuring the central production of a light jet and an asymmetry of the ... See full document

... support from: FMSR (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, and FAPESP (Brazil); MES (Bulgaria); CERN; CAS, MoST, and NSFC (China); COLCIENCIAS (Colombia); MSES (Croatia); RPF (Cyprus); Academy of ... See full document

... the Compass experiment at the Super Proton Synchrotron at CERN has col- lected large data sets, which allow to study the light-quark meson and baryon spectra with unmatched ... See full document

... Thus, knowledge of the absolute branching fractions of the X (3872) allows the di ff erent inter- pretations to be distinguished and can greatly aid in understanding the nature of the X [r] ... See full document

... these results, a more recent measurement of the lifetime of the 2 + state using a fusion reaction to populate states in the 16 C system obtains a result which corresponds to B(E2)-value of ... See full document

... for central collisions of 124,136 Xe + 112,124 Sn at bombarding energies of 32 and 45 MeV/nucleon [16]. The resulting linear dependence of this ratio on longitudinal velocity for the mixed systems ’PN’ and ’NP’ ... See full document

... unidentified hadron asymmetries [4]: at small x the asymmetries are compatible with zero, while in the valence region, they show an increasing signal, of opposite sign for + and − ...these results are in ... See full document

... (11) Figures (4) and (5) show the effect of adding the ARES resummation to an NNLO fixed order Monte Carlo cross-section for thrust and broadening in e + e − (we use the generator EERAD3 [10]). In the low τ and B T regions ... See full document