P NUCLEUS --> J/PSI X
Max results
Sort by Reverse order

Showing 10 of 24 results

A Measurement of $J / \psi$ and $\psi^{\prime}$ Production in 300-GeV/c Proton, Antiproton and $\pi^{\pm}$ Nucleon Interactions

The E705 collaboration Antoniazzi, L. ; Arenton, M. ; Cao, Z. ; et al.
Phys.Rev.D 46 (1992) 4828-4835, 1992.
Inspire Record 338055 DOI 10.17182/hepdata.22667

Hadroproduction of the Jψ and ψ′ states has been studied in 300-GeV/c proton, antiproton, and π±Li interactions. Both total and differential cross sections in xF and pT have been measured for the Jψ for the π±, proton, and antiproton interactions. The ratio of ψ′ to Jψ production has been determined for the four types of beam particles.

16 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

More…

Differential cross sections of J/psi and psi' in 800-GeV/c p Si interactions.

The E-771 collaboration Alexopoulos, T. ; Durandet, C. ; Erwin, A.R. ; et al.
Phys.Rev.D 55 (1997) 3927-3932, 1997.
Inspire Record 446872 DOI 10.17182/hepdata.22271

We present the xF and pT differential cross sections of J/ψ and ψ′, respectively, in the ranges −0.05<xF<0.25 and pT<3.5 GeV/c. The data samples are constituted by about 12 000 J/ψ and 200 ψ′ produced in proton-silicon interactions at 800 GeV/c and decaying into opposite sign muons. The xF and pT distributions are compared with recent results from experiments E789 at the same energy and to leading order QCD predictions using the MRS D0 parametrization for the parton structure function. The measured shapes of the differential cross sections, except for the dσ/dxF at small xF, agree very well with the prediction, even though their value is quite a bit larger than the prediction. We also present the cosθ differential cross section of the J/ψ which indicates unpolarized production in contrast with color octet models predictions.

5 data tables
Table 1

Additional systematic error given above.

Table 2

Additional systematic error given above.

Table 3

Additional systematic error given above.

More…

J/psi Production by 24-GeV/c Protons

The Annecy(LAPP)-Brussels-Freiburg collaboration Bamberger, A. ; Binon, F.G. ; Bricman, C. ; et al.
Nucl.Phys.B 134 (1978) 1-13, 1978.
Inspire Record 122150 DOI 10.17182/hepdata.35143

We report measurements at the CERN PS of the production cross section of J/ψ(3.1) by 24 GeV protons on hydrogen, carbon, and tungsten.

2 data tables
Table 1

No description provided.

Table 2

ASSUME B.R.(E+E-) =0.069.


Production of High Mass Muon Pairs by 225-GeV/c Hadron Beams and a Determination of the Pion Structure Function

Hogan, Gary Elliott ; Smith, A.J.S. ;
FERMILAB-THESIS-1979-09, 1979.
Inspire Record 142476 DOI 10.17182/hepdata.1200

Results are presented from an experiment with a large acceptance spectrometer that measured the production cross section of high mass muon pairs from the collision of 225 GeV/c hadron beams with a nuclear target including, for the first time, measurements using positive and negative pion beams. Various features of the data, such as the helicity anqle of the muon pairs and the ratio of the cross sections for positive and negative pions provide conclusive evidence for the quark-antiquark annihilation model for the production of muon pairs. This model is then used to determine the momentum distribution for valence quarks in pion. our best fit to the distribution,$\bar{\mu} (x) = (.73 \pm .11) x^{-1/2} [1-x] ^{(1.28 \pm .15)}$ , shows that the pion's structure! is clearly different from the proton's structure.

5 data tables
Table 1

DATA ON (E/2*PI*PMAX(RF=CM))*D2(SIG)/D(XL)/D(PT)/PT WHERE THE CENTER OF MASS DEFINITION OF THE XL ASSUMED THAT THE TARGET WAS A SINGLE NUCLEON OF MASS 0.938 GEV. Axis error includes +- 0.0/0.0 contribution (?////SYSTEMATIC ERRORS NOT GIVENFERMI//COULOMBRES-DEF(RES=J/PSI,BACK=UNCORRECTED,DEF=2.7 < M(MU+ MU-) IN GEV < 3.5)).

Table 2

DATA ON (E/2*PI*PMAX(RF=CM))*D2(SIG)/D(XL)/D(PT)/PT WHERE THE CENTER OF MASS DEFINITION OF THE XL ASSUMED THAT THE TARGET WAS A SINGLE NUCLEON OF MASS 0.938 GEV. Axis error includes +- 0.0/0.0 contribution (?////SYSTEMATIC ERRORS NOT GIVENFERMI//COULOMBRES-DEF(RES=J/PSI,BACK=UNCORRECTED,DEF=2.7 < M(MU+ MU-) IN GEV < 3.5)).

Table 3

DATA ON (E/2*PI*PMAX(RF=CM))*D2(SIG)/D(XL)/D(PT)/PT WHERE THE CENTER OF MASS DEFINITION OF THE XL ASSUMED THAT THE TARGET WAS A SINGLE NUCLEON OF MASS 0.938 GEV. Axis error includes +- 0.0/0.0 contribution (?////SYSTEMATIC ERRORS NOT GIVENFERMI//COULOMBRES-DEF(RES=J/PSI,BACK=UNCORRECTED,DEF=2.7 < M(MU+ MU-) IN GEV < 3.5)).

More…

Production of the J/psi and psi-prime (3.7) by 225-GeV/c pi+- and Proton Beams on C and SN Targets.

Branson, J.G. ; Sanders, G.H. ; Smith, A.J.S. ; et al.
Phys.Rev.Lett. 38 (1977) 1331-1334, 1977.
Inspire Record 123330 DOI 10.17182/hepdata.21022

We present results of a large-acceptance experiment in which muon pairs were observed in the mass range 0.6 to 6.0 GeV/c2. Emphasis is given to features of the production of Jψ and ψ′(3.7) particles. We find [Bσ]ψ′(3.7)[Bσ]Jψ to be 0.007±0.004 for p-C and 0.018±0.007 for π+-C interactions. Comparison with results from e+e− storage rings indicates that both the Jψ and the ψ′(3.7) are produced strongly rather than electromagnetically in our experiment.

1 data table
Table 1

No description provided.


Inclusive mu - Pair Production at 150-GeV by pi+ Mesons and Protons

Anderson, K.J. ; Henry, G.G. ; McDonald, K.T. ; et al.
Phys.Rev.Lett. 37 (1976) 799, 1976.
Inspire Record 3993 DOI 10.17182/hepdata.21035

We report the measurements of the inclusive μ-pair production by 150-GeV protons and π+ mesons on beryllium. Absolute cross sections as well as the Feynman-x and PT dependence are presented in the mass region between 0.211 and 3.5 GeV/c2. Upper limits are also given for the inclusive production of η and ρ′(1600) mesons.

7 data tables
Table 1

DATA OBTAINED FROM FIGURE BY A.A. LEBEDEV.

Table 2

DATA OBTAINED FROM FIGURE BY A.A. LEBEDEV.

Table 3

No description provided.

More…

Production of $\psi$ (3100) and $\psi^{\prime}$ (3700) in p-Be Collisions at 400-GeV

Snyder, H.D. ; Hom, D.C. ; Lederman, L.M. ; et al.
Phys.Rev.Lett. 36 (1976) 1415, 1976.
Inspire Record 108462 DOI 10.17182/hepdata.21117

We report preliminary results on the production of electron-positron pairs in the mass range 2.5 to 4 GeV in 400-GeV p-Be interactions. Production cross sections of the ψ(3100) near x=0 as a function of pt, x, and the decay angle are presented and implications of these new data for single direct leptons are discussed. A ψ′(3700) signal is observed at a level corresponding to σ(ψ′)σ(ψ)=(10±3)%.

1 data table
Table 1

No description provided.


Measurement of $\psi$ (3.1) Meson Production by Pions and Protons

Blanar, G.J. ; Boyer, C.F. ; Faissler, W.L. ; et al.
Phys.Rev.Lett. 35 (1975) 346, 1975.
Inspire Record 98776 DOI 10.17182/hepdata.21147

The production of ψ(3.1) mesons is reported for the reactions π−+Fe→μ++μ−+anything, at 200 GeV, and p+Fe→μ++μ−+anything, at 240 GeV. For ψ production, distributions in x≡PLPbeam and P⊥ are given. For x>~0.5, the ratio of the ψ production cross sections in iron for pions to that for protons is found to be 7.4±2.0.

4 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

CDB=THESE DATA TO BE MULTIPLIED BY FACTOR 10.0.

More…

Production of J / psi mesons in p Be collisions at 530-GeV/c and 800-GeV/c

The E672 & E706 collaborations Gribushin, A. ; Abramov, V. ; Antipov, Yu. ; et al.
Phys.Rev.D 62 (2000) 012001, 2000.
Inspire Record 508006 DOI 10.17182/hepdata.42099

We report on the production of J/psi mesons in 530 and 800 GeV/c proton - Be collisions in the Feynman-x range 0.0 < xf < 0.6. The J/psi mesons were detected via decays into opposite sign muon pairs. Differential distributions for J/psi production have been measured as functions of xf, pT^2, and cosine of the Gottfried-Jackson decay angle. These distributions are compared with results on J/psi production obtained in 515 GeV/c pion - Be collisions, measured by the same experiment, as well as with results from other experiments using incident protons.

6 data tables
Table 1

Differential XL distribution for J/PSI production in 530 GeV pBe collisions. Errors are combined statistics and systematics.

Table 2

Differential PT**2 distribution for J/PSI production in 530 GeV pBe collisions. Errors are combined statistics and systematics.

Table 3

Differential COS(THETA) distribution for J/PSI production in 530 GeV pBe collisions. Errors are combined statistics and systematics.

More…

Production of J / psi at large x(F) in 800-GeV/c p copper and p beryllium collisions

Kowitt, M.S. ; Gidal, G. ; Ho, P.M. ; et al.
Phys.Rev.Lett. 72 (1994) 1318-1321, 1994.
Inspire Record 361036 DOI 10.17182/hepdata.42472

The differential cross sections dσ/dxF for J/ψ produced inclusively in 800 GeV/c p-Cu and p-Be collisions have been measured in the kinematic range 0.30≤xF≤0.95 through the decay mode J/ψ→μ+μ−. They are compared with the predictions of the semilocal duality model for several sets of parton density functions. No evidence for a suggested intrinsic charm contribution to the cross section is observed. The ratio of the differential cross sections for Cu and Be targets confirms the suppression of J/ψ production in heavy nuclei at large xF.

2 data tables
Table 1

No description provided.

Table 2

No description provided.