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19912026
most citedPlanck 2015 results. XIII. Cosmological parameters

10.6k citations

Showing 2009 · hep-exShow all

38 papers · 2 filters

hep-ex2009★ 36 cited

Measurement of the D* Meson Production Cross Section and F_2^{ccbar}, at High Q^2, in ep Scattering at HERA

The H1 Collaboration

The inclusive production of D*(2010) mesons in deep-inelastic ep scattering is measured in the kinematic region of photon virtuality 100 < Q^2 < 1000 GeV^2 and inelasticity 0.02 <…

hep-ex2009★ 66 cited

Jet Production in ep Collisions at Low Q^2 and Determination of alpha_s

The H1 Collaboration

The production of jets is studied in deep-inelastic e+p scattering at low negative four momentum transfer squared 5<Q^2<100 GeV^2 and at inelasticity 0.2<y<0.7 using data recorded…

hep-ex2009★ 706 cited

Combined Measurement and QCD Analysis of the Inclusive ep Scattering Cross Sections at HERA

The H1, ZEUS Collaborations

A combination is presented of the inclusive deep inelastic cross sections measured by the H1 and ZEUS Collaborations in neutral and charged current unpolarised ep scattering at HER…

hep-ex2009★ 40 cited

Events with an Isolated Lepton and Missing Transverse Momentum and Measurement of W Production at HERA

The H1, ZEUS Collaborations

A search for events containing an isolated electron or muon and missing transverse momentum produced in ep collisions is performed with the H1 and ZEUS detectors at HERA. The data…

hep-ex2009★ 41 cited

Nuclear-mass dependence of azimuthal beam-helicity and beam-charge asymmetries in deeply virtual Compton scattering

The HERMES collaboration, A. Airapetian

The nuclear-mass dependence of azimuthal cross section asymmetries with respect to charge and longitudinal polarization of the lepton beam is studiedfor hard exclusive electroprodu…

hep-ex2009★ 44 cited

Measurement of azimuthal asymmetries associated with deeply virtual Compton scattering on an unpolarized deuterium target

The HERMES Collaboration, A. Airapetian

Azimuthal asymmetries in exclusive electroproduction of a real photon from an unpolarized deuterium target are measured with respect to beam helicity and charge. They appear in the…

hep-ex2009★ 141 cited

Observation of a J^PC = 1-+ exotic resonance in diffractive dissociation of 190 GeV/c pi- into pi- pi- pi+

The COMPASS Collaboration, A. Alekseev

The COMPASS experiment at the CERN SPS has studied the diffractive dissociation of negative pions into the pi- pi- pi+ final state using a 190 GeV/c pion beam hitting a lead target…

hep-ex2009★ 139 cited

Diffractive Electroproduction of rho and phi Mesons at HERA

The H1 Collaboration

Diffractive electroproduction of rho and phi mesons is measured at HERA with the H1 detector in the elastic and proton dissociative channels. The data correspond to an integrated l…

hep-ex2009★ 26 cited

Prompt Photons in Photoproduction at HERA

The H1 Collaboration

The production of prompt photons is measured in the photoproduction regime of electron-proton scattering at HERA. The analysis is based on a data sample corresponding to a total in…

hep-ex2009★ 131 cited

Neutrino and Antineutrino Inclusive Charged-current Cross Section Measurements with the MINOS Near Detector

The MINOS Collaboration

The energy dependence of the neutrino-iron and antineutrino-iron inclusive charged-current cross sections and their ratio have been measured using a high-statistics sample with the…

hep-ex2009★ 61 cited

Search for muon-neutrino to electron-neutrino transitions in MINOS

MINOS Collaboration

This letter reports on a search for transitions by the MINOS experiment based on a \unit[]{protons-on-target} exposure in the Fermilab NuMI beam. We…

hep-ex2009★ 83 cited

Observation of muon intensity variations by season with the MINOS far detector

The MINOS Collaboration

The temperature of the upper atmosphere affects the height of primary cosmic ray interactions and the production of high-energy cosmic ray muons which can be detected deep undergro…

hep-ex2009★ 6 cited

Comparison of large-angle production of charged pions with incident protons on cylindrical long and short targets

The HARP Collaboration, M. Apollonio, A. Artamonov +71

The HARP collaboration has presented measurements of the double-differential pi+/pi- production cross-section in the range of momentum 100 MeV/c <= p 800 MeV/c and angle 0.35 rad <…

hep-ex2009★ 54 cited

Single-spin azimuthal asymmetry in exclusive electroproduction of pi+ mesons on transversely polarized protons

HERMES Collaboration

Exclusive electroproduction of pi+ mesons was studied by scattering 27.6 GeV positrons or electrons off a transversely polarized hydrogen target. The single-spin azimuthal asymmetr…

hep-ex2009★ 47 cited

Measurement of the Longitudinal Spin Transfer to Lambda and Anti-Lambda Hyperons in Polarised Muon DIS

The COMPASS Collaboration, M. Alekseev

The longitudinal polarisation transfer from muons to lambda and anti-lambda hyperons, D_LL, has been studied in deep inelastic scattering off an unpolarised isoscalar target at the…

hep-ex2009★ 43 cited

Search for a Two-Photon Exchange Contribution to Inclusive Deep-Inelastic Scattering

The HERMES Collaboration, A. Airapetian

The transverse-target single-spin asymmetry for inclusive deep-inelastic scattering with effectively unpolarized electron and positron beams off a transversely polarized hydrogen t…

hep-ex2009★ 104 cited

Deeply Virtual Compton Scattering and its Beam Charge Asymmetry in e^\pm p Collisions at HERA

H1 Collaboration

A measurement of elastic deeply virtual Compton scattering gamma* p -> gamma p using e^+ p and e^- p collision data recorded with the H1 detector at HERA is presented. The analysed…

hep-ex2009★ 22 cited

Forward production of charged pions with incident protons on nuclear targets at the CERN PS

The Harp Collaboration

Measurements of the double-differential charged pion production cross-section in the range of momentum 0.5 GeV/c < p < 8.0 GeV/c and angle 0.025 rad < theta <0.25 rad in collisions…

hep-ex2009★ 10 cited

Observation of the Hadronic Final State Charge Asymmetry in High Q^2 Deep-Inelastic Scattering at HERA

The H1 Collaboration

A first measurement is presented of the charge asymmetry in the hadronic final state from the hard interaction in deep-inelastic ep neutral current scattering at HERA. The measurem…

hep-ex2009★ 115 cited

Measurement of the Charm and Beauty Structure Functions using the H1 Vertex Detector at HERA

The H1 Collaboration

Inclusive charm and beauty cross sections are measured in e-p and e+p neutral current collisions at HERA in the kinematic region of photon virtuality 5<Q^2<2000 GeV^2 and Bjorken s…

hep-ex2009★ 21 cited

Large-angle production of charged pions with incident pion beams on nuclear targets

The HARP Collaboration, M. Apollonio, A. Artamonov +71

Measurements of the double-differential pi+/- production cross-section in the range of momentum 100 MeV/c <= p <= 800 MeV/c and angle 0.35 rad <= theta <= 2.15 rad using pi+/- beam…

hep-ex2009★ 37 cited

Exclusive rho-0 electroproduction on transversely polarized protons

The HERMES Collaboration, A. Airapetian

The exclusive electroproduction of rho-0 mesons was studied with the HERMES spectrometer at the DESY laboratory by scattering 27.6 GeV positron and electron beams off a transversel…

hep-ex2009★ 70 cited

Transverse momentum broadening of hadrons produced in semi-inclusive deep-inelastic scattering on nuclei

The HERMES Collaboration, A. Airapetian

The first direct measurement of the dependence on target nuclear mass of the average squared transverse momentum <pt**2> of pi+, pi-, and K+ mesons from deep-inelastic lepton scatt…

hep-ex2009★ 303 cited

Observation of the Naive-T-odd Sivers Effect in Deep-Inelastic Scattering

The HERMES Collaboration

Azimuthal single-spin asymmetries of lepto-produced pions and charged kaons were measured on a transversely polarized hydrogen target. Evidence for a naive-T-odd, transverse-moment…