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Kinematic distributions and nuclear effects of J/psi production in 920-GeV fixed-target proton-nucleus collisions

The HERA-B collaboration Abt, I. ; Adams, M. ; Agari, M. ; et al.
Eur.Phys.J. C60 (2009) 525-542, 2009.
Inspire Record 804247 DOI 10.17182/hepdata.57472

Measurements of the kinematic distributions of $J/\psi$ mesons produced in $p-$C, $p-$Ti and $p-$W collisions at $\sqrt{s}=41.6 \mathrm{GeV}$ in the Feynman-$x$ region $-0.34 < x_{F} < 0.14$ and for transverse momentum up to $p_T = 5.4 \mathrm{GeV}/c$ are presented. The $x_F$ and $p_T$ dependencies of the nuclear suppression parameter, $\alpha$, are also given. The results are based on $2.4 \cdot 10^{5}$ $J/\psi$ mesons in both the $e^+ e^-$ and $\mu^{+}\mu^{-}$ decay channels. The data have been collected by the HERA-B experiment at the HERA proton ring of the DESY laboratory. The measurement explores the negative region of $x_{F}$ for the first time. The average value of $\alpha$ in the measured $x_{F}$ region is $0.981 \pm 0.015$. The data suggest that the strong nuclear suppression of $J/\psi$ production previously observed at high $x_F$ turns into an enhancement at negative $x_F$.

4 data tables

J/PSI distributions (dN/dp_T, normalized to their integrals over the measured range) for three targets materials with statistical and systematics uncertainties.

J/PSI distributions (dN/dx_F, normalized to their integrals over the measured range) for three targets materials with statistical and systematics uncertainties.

The parameter Alpha as a function of p_T. Statistical and systematic uncertainties are indicated separately.

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Angular distributions of leptons from $J/\psi$ ' $s$ produced in 920 GeV fixed-target proton-nucleus collisions

The HERA-B collaboration Abt, I. ; Adams, M. ; Agari, M. ; et al.
Eur.Phys.J. C60 (2009) 517-524, 2009.
Inspire Record 810555 DOI 10.17182/hepdata.57473

A study of the angular distributions of leptons from decays of J/psi's produced in p-C and p-W collisions at sqrt{s}=41.6 GeV has been performed in the Feynman-x region -0.34 < x_F < 0.14 and for transverse momentum up to 5.4 GeV/c. The data were collected by the HERA-B experiment at the HERA proton ring of the DESY laboratory. The results, based on a clean selection of 2.3 x 10^5 J/psi's reconstructed in both the e^+ e^- and mu^+ mu^- decay channels, indicate that J/psi's are produced with longitudinal polarization. The magnitude of the effect is maximal at low p_T. For p_T >1 GeV/c a significant dependence on the reference frame is found: the polar anisotropy is more pronounced in the Collins-Soper frame and almost vanishes in the helicity frame, where, instead, a significant azimuthal anisotropy arises.

9 data tables

Output parameters obtained by fitting the distributions.

Values of the parameters Lambda_theta, Lambda_phi et Lambda_theta_phi measured in the Collins-Soper frame as functions of the average reconstructed p_T for combined carbon and tungsten data.

Values of the parameters Lambda_theta, Lambda_phi et Lambda_theta_phi measured in the Collins-Soper frame as functions of the average reconstructed x_F for combined carbon and tungsten data.

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Production of the Charmonium States $\chi_{c1}$ and $\chi_{c2}$ in Proton Nucleus Interactions at $\sqrt{s}$ = 41.6-GeV

The HERA-B collaboration Abt, I. ; Adams, M. ; Agari, M. ; et al.
Phys.Rev. D79 (2009) 012001, 2009.
Inspire Record 790682 DOI 10.17182/hepdata.57464

A measurement of the ratio R_chic = (chic -> Jpsi + gam)/ Jpsi in pC, pTi and pW interactions at 920 GeV/c (sqrt{s}=41.6 GeV) in the Feynman-x range -0.35 < x_F(Jpsi) < 0.15 is presented. Both mu+mu- and e+e- Jpsi decay channels are observed with an overall statistics of about 15000 chic events, which is by far the largest available sample in pA collisions. The result is R_chic = 0.188+-0.013(st)(+0.024)(-0.022)(sys) averaged over the different materials, when no Jpsi and chic polarisations are considered. The chic_1 to chic_2 production ratio R_12 = R_chic1/R_chic2 is measured to be 1.02+-0.40, leading to a cross section ratio sigma(chic_1)/sigma(chic_2)=0.57+-0.23. The dependence of R_chic on the Feynman-x of the Jpsi, x_F(Jpsi), and its transverse momentum, p_T(Jpsi), is studied, as well as its dependence on the atomic number, A, of the target. For the first time, an extensive study of possible biases on R_chic and R_12 due to the dependence of acceptance on the polarization states of Jpsi and chic is performed. By varying the polarisation parameter, lambda(obs), of all produced Jpsi's by two sigma around the value measured by HERA-B, and considering the maximum variation due to the possible chic_1 and chic_2 polarisations, it is shown that R_chic could change by a factor between 1.02 and 1.21 and R_12 by a factor between 0.89 and 1.16.

3 data tables

Measurement of R_CHI/C in <E+ E->, <MU+ MU-> and combined channel.

Measurement of R_12 in <E+ E->, <MU+ MU-> and combined channel.

Measurement of SIG(C1)/SIG(C2) in <E+ E->, <MU+ MU-> and combined channel.


A Measurement of the $\psi^\prime$ to $J/\psi$ production ratio in 920-GeV proton-nucleus interactions

The HERA-B collaboration Abt, I. ; Adams, M. ; Agari, M. ; et al.
Eur.Phys.J. C49 (2007) 545-558, 2007.
Inspire Record 722216 DOI 10.17182/hepdata.57451

Ratios of the Psi' over the J/psi production cross sections in the dilepton channel for C, Ti and W targets have been measured in 920 GeV proton-nucleus interactions with the HERA-B detector at the HERA storage ring. The Psi' and J/psi states were reconstructed in both the mu+mu- and the e+e- decay modes. The measurements covered the kinematic range -0.35 < x_F < 0.1 with transverse momentum p_T < 4.5 GeV/c. The Psi' to J/psi production ratio is almost constant in the covered x_F range and shows a slow increase with p_T. The angular dependence of the ratio has been used to measure the difference of the Psi' and J/psi polarization. All results for the muon and electron decay channels are in good agreement: their ratio, averaged over all events, is R_psi'(mu)/R_psi'(e)=1.00+-0.08+-0.04. This result constitutes a new, direct experimental constraint on the double ratio of branching fractions, (B'(mu)*B(e))/(B(mu)*B'(e)), of Psi' and J/psi in the two channels.

3 data tables

Ratio of PSI(3685) and J/PSI cross sections for both muon and electron channels combined, obtained for different cos theta in the s-channel helicity frame.

Ratio of PSI(3685) and J/PSI cross sections for both muon and electron channels combined, obtained for intervals inpT using the data from all targets.

Ratio of PSI(3685) and J/PSI production cross sections per nucleus.


J/psi and psi-prime production and their normal nuclear absorption in proton-nucleus collisions at 400-GeV

The NA50 collaboration Alessandro, B. ; Alexa, C. ; Arnaldi, R. ; et al.
Eur.Phys.J. C48 (2006) 329, 2006.
Inspire Record 733916 DOI 10.17182/hepdata.57412

We report a new measurement of J/psi, psi' and Drell-Yan cross-sections, in the kinematical domain $-0.425&lt;y_{\rm cm}&lt;0.575$ and $-0.5&lt;\cos\theta_{\rm CS}&lt;0.5$, performed at the CERN-SPS using 400 GeV/c incident protons on Be, Al, Cu, Ag, W and Pb targets. The dependence of the charmonia production cross-sections on the size of the target nucleus allows to quantify the so-called normal nuclear absorption. In the framework of the Glauber model, this new measurement is combined with results previously obtained with the same apparatus, under different experimental conditions, and leads to a precise determination of the J/psi and psi' absorption cross-sections in the surrounding nuclear matter.

4 data tables

Production cross sections, per taregt nucleon for J/PSI and PSI(3685) and for Drell-Yann dimuon in the mass range of 2.9-4.5 GeV/c**, integrated in the phase space windows of the measurement.

Ratios of J/PSI, PSI(3685) and Drel Yann production cross sections, and for Drell-Yann dimuon in the mass range of 2.9-4.5 GeV/c**, integrated in the phase space windows of the measurement.

Absorption cross-section obtained with Glauber fits results only from this analysis.

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Measurement of the $J/\psi$ production cross section in 920-GeV/c fixed-target proton-nucleus interactions

The HERA-B collaboration Abt, I. ; Adams, M. ; Agari, M. ; et al.
Phys.Lett. B638 (2006) 407-414, 2006.
Inspire Record 700309 DOI 10.17182/hepdata.57500

The mid-rapidity (dsigma_(pN)/dy at y=0) and total sigma_(pN) production cross sections of J/Psi mesons are measured in proton-nucleus interactions. Data collected by the HERA-B experiment in interactions of 920 GeV/c protons with carbon, titanium and tungsten targets are used for this analysis. The J/Psi mesons are reconstructed by their decay into lepton pairs. The total production cross section obtained is sigma_(pN)(J/Psi) = 663 +- 74 +- 46 nb/nucleon. In addition, our result is compared with previous measurements.

4 data tables

Cross section for the individual targets for the visible rapidity region.

Total cross section for the individual targets extrapolated to the full phase space.

Total cross section for P NUCLEON --> J/PSI X for the full phase space.

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Charmonia and Drell-Yan production in proton-nucleus collisions at the CERN SPS

The NA50 collaboration Alessandro, B. ; Alexa, C. ; Arnaldi, R. ; et al.
Phys.Lett. B553 (2003) 167-178, 2003.
Inspire Record 612573 DOI 10.17182/hepdata.29487
5 data tables

The J/PSI production cross section times the branching ratio to MU+ MU- pernucleon-nucleon collision for the differential nuclear targets.

The PSI(3685) production cross section times the branching ratio to MU+ MU-per nucleon-nucleon collision for the differential nuclear targets.

The Drell Yan cross section, divided by the mass number A, and multiplied by the isospin correction factors in the mass interval 2.9 to 4.5 GeV.

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Charmonium production and nuclear absorption in p A interactions at 450-GeV

The NA50 collaboration Alessandro, B. ; Alexa, C. ; Arnaldi, R. ; et al.
Eur.Phys.J. C33 (2004) 31-40, 2004.
Inspire Record 629957 DOI 10.17182/hepdata.30011
13 data tables

The J/PSI production cross sections, per target nucleon, times the di-muon branching ratio for the two data samples.

The PSI(3685) production cross sections, per target nucleon, times the di-muon branching ratio for the two data samples.

J/PSI production cross section times the di-muon branching ratio for the BEtarget as a function of the Feynman X bin.

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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. D62 (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

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

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

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

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

The E-771 collaboration Alexopoulos, T. ; Durandet, C. ; Erwin, A.R. ; et al.
Phys.Rev. D55 (1997) 3927-3932, 1997.
Inspire Record 446872 DOI 10.17182/hepdata.22271
5 data tables

Additional systematic error given above.

Additional systematic error given above.

Additional systematic error given above.

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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
2 data tables

No description provided.

No description provided.


A Measurement of J / psi and psi-prime production in 300-GeV/c proton, anti-proton and pi+- nucleon interactions

The E705 collaboration Antoniazzi, L. ; Arenton, M. ; Cao, Z. ; et al.
Phys.Rev. D46 (1992) 4828-4835, 1992.
Inspire Record 338055 DOI 10.17182/hepdata.22667
16 data tables

No description provided.

No description provided.

No description provided.

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J / psi and muon pair cross-sections in proton nucleus and nucleus-nucleus collisions at 200-GeV per nucleon

Baglin, C. ; Baldisseri, A. ; Bussiere, A. ; et al.
Phys.Lett. B270 (1991) 105-110, 1991.
Inspire Record 328409 DOI 10.17182/hepdata.29301
10 data tables

Cross sections fitted with SIG0*(A(P=1)*A(P=2))** ALPHA. ALPHA is coded here as POWER(N=A*A,YN=SIG).

Cross sections fitted with SIG0*(A(P=1)*A(P=2))** ALPHA. ALPHA is coded here as POWER(N=A*A,YN=SIG).

No description provided.

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Properties of J / psi production in pi- Be and p Be collisions at 530-GeV/c

The E672/706 collaboration Abramov, V. ; Antipov, Yu. ; Baldin, B. ; et al.
No Journal Information, 1991.
Inspire Record 315071 DOI 10.17182/hepdata.42566
2 data tables

Data is extrapolated to full x range.

Data requested from authors.


The A-dependence of J / psi and psi-prime production at 800-GeV/c

Alde, D.M. ; Baer, H.W. ; Carey, T.A. ; et al.
Phys.Rev.Lett. 66 (1991) 133-136, 1991.
Inspire Record 301531 DOI 10.17182/hepdata.19916
13 data tables

Ratio of heavy nucleus to deuterium yields. A is the mass number of the target nucleus.

Ratio of heavy nucleus to deuterium yeilds. A is the mass number of the target nucleus.

Ratio of heavy nucleus to deuterium yeilds. A is the mass number of the target nucleus.

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Experimental J/psi Hadronic Production from 150-GeV/c to 280-GeV/c

The NA3 collaboration Badier, J. ; Boucrot, J. ; Bourotte, J. ; et al.
Z.Phys. C20 (1983) 101, 1983.
Inspire Record 191240 DOI 10.17182/hepdata.2212
11 data tables

No description provided.

No description provided.

No description provided.

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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

DATA OBTAINED FROM FIGURE BY A.A. LEBEDEV.

DATA OBTAINED FROM FIGURE BY A.A. LEBEDEV.

No description provided.

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

Hogan, Gary Elliott ;
PhD Thesis, 1979.
Inspire Record 142476 DOI 10.17182/hepdata.1200
5 data tables

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)).

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)).

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)).

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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. B134 (1978) 1-13, 1978.
Inspire Record 122150 DOI 10.17182/hepdata.35143
2 data tables

No description provided.

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


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
1 data table

No description provided.


J/psi Particle Production by 70-GeV/c Protons

Antipov, Yu.M. ; Bessubov, V.A. ; Budanov, N.P. ; et al.
Phys.Lett. B60 (1976) 309, 1976.
Inspire Record 100281 DOI 10.17182/hepdata.6524
5 data tables

No description provided.

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

ASSUME A**(2/3) DEPENDENCE FOR SIGMA.

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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
1 data table

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
4 data tables

No description provided.

No description provided.

CDB=THESE DATA TO BE MULTIPLIED BY FACTOR 10.0.

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Experimental Results on $J/\psi$ Production by $\pi^\pm$, $K^\pm$, $p$ and $\bar{p}$ Beams at 39.5-{GeV}

Corden, M.J. ; Dowell, J.D. ; Garvey, J. ; et al.
Phys.Lett. B96 (1980) 411, 1980.
Inspire Record 154482 DOI 10.17182/hepdata.44040
2 data tables

No description provided.

No description provided.