M. Mestayer

activity

20002016

S = + 1

Baryon in Exclusive Photoproduction from the Deuteron

396 citations · 4.1k across the 59 of their papers we have counts for

collaborators

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29 papers · 1 filter

hep-ex2015★ 21 cited

A search for baryon- and lepton-number violating decays of $Λ$ hyperons using the CLAS detector at Jefferson Laboratory

M. E. McCracken, M. Bellis, K. P. Adhikari +128

We present a search for ten baryon-number violating decay modes of $Λ$ hyperons using the CLAS detector at Jefferson Laboratory. Nine of these decay modes result in a single meson…

hep-ex2014★ 56 cited

Spin and parity measurement of the Lambda(1405) baryon

Kei Moriya, Reinhard A. Schumacher

A determination of the spin and parity of the $Λ (1405)$ is presented using photoproduction data from the CLAS detector at Jefferson Lab. The reaction $γ + p \to K^{+} + Λ (1405)$ is an…

hep-ex2012★ 3 cited

Comment on the narrow structure reported by Amaryan et al

M. Anghinolfi, J. Ball, N. A. Baltzell +94

The CLAS Collaboration provides a comment on the physics interpretation of the results presented in a paper published by M. Amaryan et al. regarding the possible observation of a n…

hep-ex2008★ 1 cited

Beam Spin Asymmetries in DVCS with CLAS at 4 .8 GeV

G. Gavalian

We report measurements of the beam spin asymmetry in Deeply Virtual Compton Scattering (DVCS) at an electron beam energy of 4.8 GeV using the CLAS detector at the Thomas Jefferson…

hep-ex2008★ 66 cited

Measurement of unpolarized semi-inclusive pi+ electroproduction off the proton

CLAS Collaboration, M. Osipenko, M. Ripani +3

Semi-inclusive pi+ electroproduction on protons has been measured with the CLAS detector at Jefferson Lab. The measurement was performed on a liquid-hydrogen target using a 5.75 Ge…

hep-ex2008★ 36 cited

Search for the photo-excitation of exotic mesons in the pi+pi+pi- system

M. Nozar, C. Salgado, D. P. Weygand +2

A search for exotic mesons in the $π^{+} π^{+} π^{-}$ system photoproduced by the charge exchange reaction $γ p \to π^{+} π^{+} π^{-} (n)$ was carried out by the CLAS collaboration at Jef…

hep-ex2007★ 194 cited

Deeply Virtual Compton Scattering Beam-Spin Asymmetries

F. X. Girod, R. A. Niyazov et al

The beam spin asymmetries in the hard exclusive electroproduction of photons on the proton (ep -> epg) were measured over a wide kinematic range and with high statistical accuracy.…

hep-ex2006★ 66 cited

Separated Structure Functions for the Exclusive Electroproduction of $K^{+} Λ$ and $K^{+} Σ^{0}$ Final States

P. Ambrozewicz, D. S. Carman, R. J. Feuerbach +4

We report measurements of the exclusive electroproduction of $K^{+} Λ$ and $K^{+} Σ^{0}$ final states from a proton target using the CLAS detector at the Thomas Jefferson National Accelera…

hep-ex2006★ 56 cited

Search for the $Θ^{+}$ pentaquark in the reactions $γ p \to K ˉ^{0} K^{+} n$ and $γ p \to K ˉ^{0} K^{0} p$

R. De Vita, M. Battaglieri, V. Kubarovsky +9

The exclusive reactions $γ p \to K ˉ^{0} K^{+} n$ and $γ p \to K ˉ^{0} K^{0} p$ have been studied in the photon energy range 1.6--3.8 GeV, searching for evidence of the exotic baryon $…

hep-ex2006★ 104 cited

Measurement of the N to Delta(1232) Transition at High Momentum Transfer by pi0 Electroproduction

M. Ungaro, P. Stoler, I. Aznauryan +4

We report a new measurement of the exclusive electroproduction reaction gamma* p -> pi0 p to explore the evolution from soft non-perturbative physics to hard processes via the Q2 d…

hep-ex2006★ 13 cited

Search for $Θ^{++}$ Pentaquarks in the Exclusive Reaction $γ p \to K^{+} K^{-} p$

V. Kubarovsky, M. Battaglieri, R. De Vita +6

The reaction $γ p \to p K^{+} K^{-}$ was studied at Jefferson Lab with photon energies from 1.8 to 3.8 GeV using a tagged photon beam. The goal was to search for a $Θ^{++}$ pentaquark, a…

hep-ex2006★ 94 cited

Search for the $Θ^{+}$ pentaquark in the reaction $γ d \to p K^{-} K^{+} n$

B. McKinnon, K. Hicks

A search for the \thp in the reaction $γ d \to p K^{-} K^{+} n$ was completed using the CLAS detector at Jefferson Lab. A study of the same reaction, published earlier, reported the observ…

hep-ex2005★ 78 cited

Search for $Θ^{+} (1540)$ pentaquark in high statistics measurement of $γ p \to K ˉ^{0} K^{+} n$ at CLAS

M. Battaglieri, R. De Vita, V. Kubarovsky +5

The exclusive reaction $γ p \to K ˉ^{0} K^{+} n$ was studied in the photon energy range between 1.6-3.8 GeV searching for evidence of the exotic baryon $Θ^{+} (1540) \to n K^{+}$ . The decay…

hep-ex2005★ 61 cited

Beam-Helicity Asymmetries in Double-Charged-Pion Photoproduction on the Proton

CLAS Collaboration, S. Strauch, B. L. Berman

Beam-helicity asymmetries for the two-pion-photoproduction reaction gamma + p --> p pi+ pi- have been studied for the first time in the resonance region for center-of-mass energies…

hep-ex2005★ 48 cited

Deeply virtual and exclusive electroproduction of omega mesons

CLAS collaboration, L. Morand

The exclusive omega electroproduction off the proton was studied in a large kinematical domain above the nucleon resonance region and for the highest possible photon virtuality (Q2…

hep-ex2004★ 49 cited

Exclusive $ρ^{0}$ meson electroproduction from hydrogen at CLAS

C. Hadjidakis

The longitudinal and transverse components of the cross section for the $e p \to e^{'} p ρ^{0}$ reaction were measured in Hall B at Jefferson Laboratory using the CLAS detector. Th…

hep-ex2003★ 15 cited

Tensor Polarization of the phi meson Photoproduced at High t

K. McCormick, the CLAS collaboration

As part of a measurement of the cross section of $ϕ$ meson photoproduction to high momentum transfer, we measured the polar angular decay distribution of the outgoing $K^{+}$ in the…

hep-ex2003★ 254 cited

Observation of an Exotic Baryon with S=+1 in Photoproduction from the Proton

V. Kubarovsky

The reaction $γ p \to π^{+} K^{-} K^{+} n$ was studied at Jefferson Lab using a tagged photon beam with an energy range of 3-5.47 GeV. A narrow baryon state with strangeness S=+1 and mass $M…

hep-ex2003★ 396 cited

Observation of an Exotic $S = + 1$ Baryon in Exclusive Photoproduction from the Deuteron

S. Stepanyan, The CLAS collaboration

In an exclusive measurement of the reaction $γ d \to K^{+} K^{-} p n$ , a narrow peak that can be attributed to an exotic baryon with strangeness $S = + 1$ is seen in the $K^{+} n$ invariant m…

hep-ex2003

Measurement of $e p \to e^{^{'}} p π^{+} π^{-}$ : experimental procedures and baryon resonance analysis

M. Ripani, V. D. Burkert, V. Mokeev +4

The cross section for the reaction $e p \to e^{'} p π^{+} π^{-}$ was measured in the resonance region for 1.4 $<$ W $<$ 2.1 GeV and 0.5 $< Q^{2} <$ 1.5 GeV $^{2}$ /c $^{2}$ using the CL…

hep-ex2003★ 134 cited

Measurement of Beam-Spin Asymmetries for Deep Inelastic $π^{+}$ Electroproduction

CLAS Collaboration, H. Avakian

We report the first evidence for a non-zero beam-spin azimuthal asymmetry in the electroproduction of positive pions in the deep-inelastic region. Data have been obtained using a p…

hep-ex2002★ 71 cited

First Measurement of Transferred Polarization in the Exclusive e p --> e' K+ Lambda Reaction

CLAS Collaboration, D. S. Carman

The first measurements of the transferred polarization for the exclusive ep --> e'K+ Lambda reaction have been performed in Hall B at the Thomas Jefferson National Accelerator Faci…

hep-ex2002★ 51 cited

Photoproduction of the $ω$ meson on the proton at large momentum transfer

M. Battaglieri, M. Brunoldi, R. De Vita +4

The differential cross section, $d σ / d t$ for $ω$ meson exclusive photoproduction on the proton above the resonance region ( $2.6 < W < 2.9$ GeV) was measured up to a momentum transfer $-…

hep-ex2001★ 205 cited

$Q^{2}$ Dependence of Quadrupole Strength in the $γ^{*} p \to Δ^{+} (1232) \to p π^{0}$ Transition

CLAS Collaboration, K. Joo, L. C. Smith

Models of baryon structure predict a small quadrupole deformation of the nucleon due to residual tensor forces between quarks or distortions from the pion cloud. Sensitivity to qua…

A search for baryon- and lepton-number violating decays of Λ hyperons using the CLAS detector at Jefferson Laboratory

Spin and parity measurement of the Lambda(1405) baryon

Comment on the narrow structure reported by Amaryan et al

Beam Spin Asymmetries in DVCS with CLAS at 4 .8 GeV

Measurement of unpolarized semi-inclusive pi+ electroproduction off the proton

Search for the photo-excitation of exotic mesons in the pi+pi+pi- system

Deeply Virtual Compton Scattering Beam-Spin Asymmetries

Separated Structure Functions for the Exclusive Electroproduction of K+Λ and K+Σ0 Final States

Search for the Θ+ pentaquark in the reactions γp→Kˉ0K+n and γp→Kˉ0K0p

Measurement of the N to Delta(1232) Transition at High Momentum Transfer by pi0 Electroproduction

Search for Θ++ Pentaquarks in the Exclusive Reaction γp→K+K−p

Search for the Θ+ pentaquark in the reaction γd→pK−K+n

Search for Θ+(1540) pentaquark in high statistics measurement of γp→Kˉ0K+n at CLAS