427 citations · 1.1k across the 23 of their papers we have counts for
20 papers · 1 filter
Improved exclusion limit for light dark matter from annihilation in NA64
Yu. Andreev, D. Banerjee, J. Bernhard +55
The current most stringent constraints for the existence of sub-GeV dark matter coupling to Standard Model via a massive vector boson were set by the NA64 experiment for…
Search for pseudoscalar bosons decaying into pairs in the NA64 experiment at the CERN SPS
Yu. M. Andreev, D. Banerjee, J. Bernhard +52
We report the results of a search for a light pseudoscalar particle that couples to electrons and decays to performed using the high-energy CERN SPS H4 electron beam.…
Measurement of -weighted Sivers asymmetries in leptoproduction of hadrons
M. G. Alexeev, G. D. Alexeev, A. Amoroso +209
The transverse spin asymmetries measured in semi-inclusive leptoproduction of hadrons, when weighted with the hadron transverse momentum , allow for the extraction of importan…
Search for a Hypothetical 16.7 MeV Gauge Boson and Dark Photons in the NA64 Experiment at CERN
D. Banerjee, V. E. Burtsev, A. G. Chumakov +45
We report the first results on a direct search for a new 16.7 MeV boson (X) which could explain the anomalous excess of e+e- pairs observed in the excited Be-8 nucleus decays. Due…
Transverse Extension of Partons in the Proton probed by Deeply Virtual Compton Scattering
R. Akhunzyanov, M. G. Alexeev, G. D. Alexeev +223
We report on the first measurement of exclusive single-photon muoproduction on the proton by COMPASS using 160 GeV/ polarized and beams of the CERN SPS impinging on…
K over K multiplicity ratio for kaons produced in DIS with a large fraction of the virtual-photon energy
R. Akhunzyanov, M. G. Alexeev, G. D. Alexeev +207
The K over K multiplicity ratio is measured in deep-inelastic scattering, for the first time for kaons carrying a large fraction of the virtual-photon energy. The d…
The transverse momentum dependence of charged kaon Bose-Einstein correlations in the SELEX experiment
SELEX Collaboration, G. A. Nigmatkulov, A. K. Ponosov +101
We report on the measurement of the one-dimensional charged kaon correlation functions using 600~GeV/{\it c} , and 540~GeV/{\it c} beams from the SELEX~(E781) experi…
Nuclear Dependence of Charm Production
The SELEX Collaboration, A. Blanco-Covarrubias, J. Engelfried
With data taken by SELEX, which accumulated data during the 1996-1997 fixed target run at Fermilab, we study the production of charmed hadrons on copper and carbon targets with Sig…
Observation of a resonance in the Kp decay channel at a mass of 1765 MeV/c
WA89 Collaboration, M. I. Adamovich, Yu. A. Alexandrov +60
We report on the observation of a Kp resonance signal at a mass of 17655 MeV/c, with intrinsic width MeV/c, produced inclusively in -nucleus in…
First observation of a narrow charm-strange meson DsJ(2632) -> Ds eta and D0 K+
The SELEX Collaboration, A. V. Evdokimov
We report the first observation of a charm-strange meson DsJ(2632) at a mass of 2632.6+/-1.6 MeV/c^2 in data from SELEX, the charm hadro-production experiment E781 at Fermilab. Thi…
Production Asymmetry of from 600 GeV/c and beam
M. Kaya
The production of relative to as a function of with 600 GeV/c beam is measured in the interval by the SELEX (E781) experiment at Fer…
First Observation of the Doubly Charmed Baryon Xi_cc^+
The SELEX Collaboration, M. Mattson
We observe a signal for the doubly charmed baryon Xi_cc^+ in the charged decay mode Xi_cc^+ --> Lambda_c^+ K- pi+ in data from SELEX, the charm hadro-production experiment at Fermi…
Hadronic Production of Lambda_c from 600 GeV/c pion, sigma and proton beams
SELEX Collaboration, Fernanda G. Garcia
We present data from Fermilab experiment E781 (SELEX) on the hadroproduction asymmetry for anti-Lambda_c compared to Lambda_c+ as a function of xF and pt2 distributions for Lambda_…
First Measurement of pi e -> pi e gamma Pion Virtual Compton Scattering
FNAL SELEX Collaboration
Pion Virtual Compton Scattering (VCS) via the reaction pi e --> pi e gamma was observed in the Fermilab E781 SELEX experiment. SELEX used a 600 GeV/c pi- beam incident on target at…
Measurement of the Ds lifetime
M. Iori
We report precise measurement of the Ds meson lifetime. The data were taken by the SELEX experiment (E781) spectrometer using 600 GeV/c Sigma-, pi- and p beams. The measurement has…
Measurement of the Sigma^- Charge Radius by Sigma^- Electron Elastic Scattering
SELEX Collaboration, I. Eschrich
The Sigma^- mean squared charge radius has been measured in the space-like Q^2 range 0.035-0.105 GeV^2/c^2 by elastic scattering of a Sigma^- beam off atomic electrons. The measure…
Precision measurements of the Lambda_c+ and D0 lifetimes
The SELEX collaboration, A. Kushnirenko
We report new precision measurements of the lifetimes of the Lambda_c+ and D0 from SELEX, the charm hadro-production experiment at Fermilab. Based upon 1630 Lambda_c+ and 10210 D0…
Total Cross Section Measurements with pi-, Sigma- and Protons on Nuclei and Nucleons around 600 GeV/c
The SELEX Collaboration, U. Dersch
Total cross sections for Sigma- and pi- on beryllium, carbon, polyethylene and copper as well as total cross sections for protons on beryllium and carbon have been measured in a br…
Observation of the Cabibbo-suppressed decay Xi_c+ -> p K- pi+
SELEX Collaboration, S. Y. Jun
We report the first observation of the Cabibbo-suppressed charm baryon decay Xi_c+ -> p K- pi+. We observe 150 +- 22 events for the signal. The data were accumulated using the SELE…
First Charm Hadroproduction Results from SELEX
SELEX Collaboration, J. Russ
The SELEX experiment (E781) at Fermilab is a 3-stage magnetic spectrometer for the high statistics study of charm hadroproduction out to large x_F using 600 GeV Sigma^-, p and pi b…