Observation of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mfrac><mml:mrow><mml:mi>J</mml:mi></mml:mrow><mml:mrow><mml:mi>ψ</mml:mi></mml:mrow></mml:mfrac><mml:mn /><mml:mo>(</mml:mo><mml:mn>3100</mml:mn><mml:mo>)</mml:mo><mml:mn /></mml:math>Production by 209-GeV Muons

Clark, A. R.; Johnson, K. J.; Kerth, L. T.; Loken, S.; Markiewicz, T. W.; Meyers, P. D.; Smith, W. H.; Strovink, M.; Wenzel, W. A.; Johnson, R.P.; Moore, C. D.; Mugge, M.; Shafer, Robert E.; Gollin, G. D.; Shoemaker, F. C.; Surko, P.

doi:10.1103/physrevlett.43.187

Cited by 50 publications

(4 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Fits to experimental data of [27]. The measured ν dependence of σ(ν) is well described by the phenomenological parameterization [15,16,28,29,30]…”

Section: As Usual We Define the Partonic Mandelstam Variables Asŝmentioning

confidence: 91%

J/ψ inclusive production in νN neutral-current deep-inelastic scattering

Kniehl¹,

Zwirner²

2002

Nuclear Physics B

View full text Add to dashboard Cite

We calculate the cross section of J/ψ inclusive production in neutrino-nucleon deep-inelastic scattering via the weak neutral current within the factorization formalism of nonrelativistic quantum chromodynamics. Besides J/ψ single production via the Z-gluon fusion mechanism, we also consider J/ψ plus hadron-jet associated production. We take into account both direct production and feed-down from directly-produced heavier charmonia. We present theoretical predictions for the J/ψ transverse-momentum and rapidity distributions, which can be measured in the CHORUS and NOMAD experiments at CERN, including conservative error estimates. In order to interpret a recent CHORUS measurement of the total cross section, we also estimate the contribution due to J/ψ prompt production via diffractive processes using the vector-meson dominance model. 13.60.Hb, 13.60.Le, 14.40.Gx (8) 1 , and O ψ 3 P (8) J , with J = 0, 1, 2, while those of the P -wave charmonia χ cJ are O χ cJ 3 P (1) J and O χ cJ 3 S (8) 1 . They satisfy the multiplicity relations O ψ 3 P (8) J = (2J + 1) O ψ 3 P (8) 0

show abstract

“…Fits to experimental data of [27]. The measured ν dependence of σ(ν) is well described by the phenomenological parameterization [15,16,28,29,30]…”

Section: As Usual We Define the Partonic Mandelstam Variables Asŝmentioning

confidence: 91%

J/ψ inclusive production in νN neutral-current deep-inelastic scattering

Kniehl¹,

Zwirner²

2002

Nuclear Physics B

View full text Add to dashboard Cite

show abstract

“…The production of J/ψ and ψ(2S) mesons was studied using fixed-target spectrometers in tagged and wideband photon beams for photon energies up to 225 GeV at FNAL [65]. Comparable energies were reached in muoproduction Berkeley/Princeton/FNAL collaboration [66] at FNAL and by the EMC [67] and NMC [68] collaborations at CERN. The NA14 collaboration at CERN also measured J/ψ photoproduction in a CERN photon beam at such energies [69].…”

Section: Photoproductionmentioning

confidence: 99%

Exclusive Production of Neutral Vector Mesons at the Electron-Proton Collider HERA

Crittenden¹

1997

Springer Tracts in Modern Physics

View full text Add to dashboard Cite

The first five years of operation of the multi-purpose experiments ZEUS and H1 at the electron-proton storage ring facility HERA have opened a new era in the study of vector-meson production in high-energy photon-proton interactions. The high center-ofmass energy available at this unique accelerator complex allows investigations in hitherto unexplored kinematic regions, providing answers to long-standing questions concerning the energy-dependence of the ρ 0 , ω, φ, and J/ψ production cross sections. The excellent angular acceptance of these detectors, combined with that of specialized tagging detectors at small production angles, has permitted measurements of elastic and inelastic production processes for both quasi-real photons and those of virtuality exceeding the squared mass of the vector meson. This report provides a quantitative picture of the present status of these studies, comparing them to the extensive measurements in this field at lower energies and summarizing topical developments in theoretical work motivated by the new data.

show abstract

“…There are various methods of characterizing this modification, but all appear to be subject to substantial uncertainties from the (non-perturbative) fragmentation of the primary quarks and gluons into the observed hadrons. At a center of mass energy .,f8::::: 30 GeV, values 69…”

Section: E Comparison With Other Experimentsmentioning

confidence: 99%

Measurement of the nucleon structure function in iron using 215- and 93-GeV muons

Meyers¹,

Clark

Johnson

et al. 1986

Phys. Rev. D

Self Cite

View full text Add to dashboard Cite

We have measured the inclusive deep inelastic scattering of muons on nucleons in iron using beams of 93 and 215GeV muons. To perform this measurement, we have built and operated the Multimuon Spectrometer (MMS) in the muon beam at Fermilab. Using the known form of the radiativelycorrected electromagnetic cross section, we extract the struc- A. KinematicsThe Feynman diagram for deep inelastic lepton-hadron scattering in the lowest order of QED is shown in Fig. 1, together with a summary of our kinematical notation. To this order, the process is described as the exchange of one virtual photon. QED allows us to calculate unambiguously what happens at the leptonic (upper) vertex. The goal of our experiment is to uncover what happens in the region surrounding the hadronic vertex.We will be studying inclusive scattering, p.N -+ p.X, with no reference to any particular hadronic final state. This means that the only relevant 4-vectors at the hadronic vertex are p and q, and the only Lorentz-invariant quantities are q 2 and p · q (and p 2 = MJ.). While isolating the hadronic vertex is a productive move toward understanding the scattering process, experimentally it is imp_ortant to note that these quantities can be measured 3 ' < using only the initial and final muons:Q 2 = -q 2 = 4EE'sin 2 ~. where E, E', and 9 are the initial and final muon energies and the muon scattering angle as measured in the laboratory frame (the target rest frame). Terms containing the lepton mass have been neglected. Another useful quantity is the invariant mass of the hadronic final state: W 2 = (p + q) 2 = MJ. + 2MNv-Q 2 • The elastic limit is W 2 = MJ. or Q 2 = 2MNV. Resonances appear at fixed W 2 near this limit. Figure 2 shows the region of the Q 2 -v plane accessible to inelastic scattering at fixed incident energy E.It is convenient to describe another set of variables that are Q 2 and v scaled by their maximum values, neglecting lepton masses:v = Q 2 j2MNE = xy. B. Cross section and structure functionsBy demanding Lorentz covariance and gauge invariance we can translate 7 • 8 the diagram of Fig. 1 directly into an expression for the spin-averaged inclusive cross section:dQ2dv-~ 2Wl(Q ,v)sm 2 + W2 (Q 2 ,v)cos 2 2 ], (3) in terms of the two unknown "structure functions" wl and w2. scalar functions that describe the hadronic electromagnetic current. We treat the incident muon as a source of virtual photons and write the cross section as where T and L refer to transversely and longitudinally polarized virtual ph'?tons and K is a flux factor. Defining R = uL/uT we can eliminate W 1 in favor of R in the cross section Eq. 3. The advantages of this substitution will be described in the next section where it is shown that for some cases of interest R is expected to be small. For now we record the cross section in its new form, The approximate form comes from taking the Bjorken limit where energies (E,Q 2 ,v)-+ oo with x and y-finite. 10 In the kinematic region covered by our data, making such an approximation has a maximum effect of < ! % on our ...

show abstract

Observation ofJψ(3100)Production by 209-GeV Muons

Cited by 50 publications

References 12 publications

J/ψ inclusive production in νN neutral-current deep-inelastic scattering

J/ψ inclusive production in νN neutral-current deep-inelastic scattering

Exclusive Production of Neutral Vector Mesons at the Electron-Proton Collider HERA

Measurement of the nucleon structure function in iron using 215- and 93-GeV muons

Contact Info

Product

Resources

About