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Inclusive $\pi^0$ and Eta0 Production in $\pi^- p$ Interactions at 360-{GeV}/$c$

The NA27 & LEBC-EHS collaborations Aguilar-Benitez, M. ; Bailly, J.L. ; Baland, J.F. ; et al.
Z.Phys.C 34 (1987) 419, 1987.
Inspire Record 234876 DOI 10.17182/hepdata.15777

Theπ0 andη0 production is studied inπ−p interactions at 360 GeV/c. The cross section forπ0 production in the forward hemisphere (X>0) isσ(π0)=(49.7 ± 1.0 ± 1.1) mb and for η withX>0.1,Nch>2,σ(η0)=(3.1 ± 0.5) mb. The ratio of theπ0 toη0 cross section forX>0.1,Nch>2 isσ(π0)/σ(η0). Results on FeynmanX andpT distributions are presented. The data were obtained using the European Hybrid Spectrometer EHS and the bubble chamber LEBC at CERN.

6 data tables
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Production of pi0 and eta mesons at large transverse momenta in pi- p and pi- Be interactions at 515-GeV/c.

The Fermilab E706 collaboration Apanasevich, L. ; Bacigalupi, J. ; Baker, W. ; et al.
Phys.Rev.D 69 (2004) 032003, 2004.
Inspire Record 625447 DOI 10.17182/hepdata.42836

We present results on the production of high transverse momentum pizero and eta mesons in pi-p and pi-Be interactions at 515 GeV/c. The data span the kinematic ranges 1 < p_T < 11 GeV/c in transverse momentum and -0.75 < y < 0.75 in rapidity. The inclusive pizero cross sections are compared with next-to-leading order QCD calculations and to expectations based on a phenomenological parton-k_T model.

19 data tables
Table 1

Invariant differential cross section per nucleon for inclusive PI0 production in PI- BE collisions at 515 GeV averaged over the cm rapidity interval -0.75 to 0.75.

Table 2

Invariant differential cross section for inclusive PI0 production in PI- P collisions at 515 GeV averaged over the cm rapidity interval -0.75 to 0.75.

Table 3

The averaged invariant differential cross section per nucleon as a functionof rapidity in the PT intervals 1.00 to 1.50 and 1.50 to 2.00 GeV for PI0 produ ction in PI- BE interactions at 515 GeV.

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Inclusive production of $\pi^0$ mesons in $\pi$p, Kp and $\gamma$p collisions at energies around 100-GeV.

The Omega Photon collaboration Apsimon, R.J. ; Atkinson, M. ; Baake, M. ; et al.
Z.Phys.C 52 (1991) 397-405, 1991.
Inspire Record 325149 DOI 10.17182/hepdata.14858

Measurements are reported of inclusive production of π0-mesons in the beam fragmentation region in γp, πp andKp collisions. Results include the ratio of π0 production inKp and πp collisions, showing reduced production from fragmentation of theK-meson, and the ratio of π0 production in photon and hadron collisions which shows agreement with modified Vector Meson Dominance at lowPT, and departures at higherPT signalling the onset of direct photon reactions. The pattern of departure from Feynman scaling at highPT points to a contribution of hard parton-parton collisions in both γp and πp collisions.

28 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Observation of significant spin effects in hard collisions at 40-GeV/c

Apokin, V.D. ; Arestov, Yu.I. ; Astafev, O.V. ; et al.
Phys.Lett.B 243 (1990) 461-464, 1990.
Inspire Record 303587 DOI 10.17182/hepdata.29694

A single-spin asymmetry in the inclusive π 0 production at small x F was measured. In the experiment 40 GeV/c π − mesons were incident on transversely polarized protons and deutrons. An asymmetry of (40–50)% has been revealed in the hard scattering region.

1 data table
Table 1

No description provided.


Vector Meson Production in $\pi^- p$ Interactions at 360-{GeV}/$c$

The LEBC-EHS collaboration Aguilar-Benitez, M. ; Bailly, J.L. ; Batalov, A.A. ; et al.
Z.Phys.C 44 (1989) 531, 1989.
Inspire Record 278763 DOI 10.17182/hepdata.15359

The inclusive production of vector mesons (charged ρ(770), ω(783), ϕ(1020) and neutralK*(892)) in π−p interactions at 360 GeV/c is studied. The data are based on 160 000 reconstructed events recorded in the NA 27 Experiment using the LEBC-EHS facility at CERN. The production cross sections in the forward hemisphere in c.m.s. and the longitudinal momentum distributions are determined. The results are compared with data obtained at lower energies.

17 data tables
Table 1

No description provided.

Table 2

Upper limits of cross sections.

Table 3

Cross sections extrapolated to x > 0.

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A Measurement of $\pi^0$ Production at Large Transverse Momentum in $\pi^- p$, $\pi^+ p$ and $p p$ Collisions at 300-{GeV}/$c$

The NA24 collaboration De Marzo, C. ; De Palma, M. ; Favuzzi, C. ; et al.
Phys.Rev.D 36 (1987) 16, 1987.
Inspire Record 236249 DOI 10.17182/hepdata.23354

Cross sections for inclusive π0 production at large transverse momentum pT were measured in π−p, π+p, and pp collisions at 300 GeV/c. The cross-section ratio σ(π−p→π0X)/σ(π+p→π0X) was found to be consistent with unity in the pT region of 1 to 5 GeV/c. The cross-section ratio σ(π+p→π0X)/σ(pp→π0X) however is growing with increasing pT and increasing π0 c.m.-system rapidity in agreement with parton-model expectations, where the partons in the pions have on average higher momenta than in the proton.

1 data table
Table 1

THERE IS ALSO A 1 PCT UNCERTAINTY IN THE PT SCALE AND A 7 PCT UNCERTAINTY IN THE NORMALISATION.


INCLUSIVE CHARACTERISTICS OF GAMMA QUANTA IN PI- C-12 INTERACTIONS AT 4-GEV/C. (IN RUSSIAN)

Artykov, Kh.Kh. ; Eliseev, S.M. ; Inogamov, Sh.V. ; et al.
Yad.Fiz. 44 (1986) 400-405, 1986.
Inspire Record 239277 DOI 10.17182/hepdata.2593

None

7 data tables
Table 1

MULTIPLICITIES OF PI0 WAS OBTANED FROM MULTIPLICITIES OF GAMMAS: MULT(PI0)=MULT(GAMMA)/2.

Table 2

PI- NUCLEON= (PI- P + PI- N)/2.

Table 3

PI- NUCLEON= (PI- P + PI- N)/2.

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High Transverse Momentum $\pi^0$ Production by $\pi^-$ and $\pi^+$ on Protons at 280-{GeV}/$c$

The WA70 collaboration Bonesini, M. ; Bonvin, E. ; Booth, P.S. L. ; et al.
Z.Phys.C 37 (1987) 39-50, 1987.
Inspire Record 250754 DOI 10.17182/hepdata.15679

The inclusive cross sections for π0 production by π− and π+ on protons have been measured with a beam momentum of 280 GeV/c using a fine grained electromagnetic calorimeter and the CERN Omega spectrometer. The transverse momentum and FeynmanxF ranges covered are 4.0<pT<7.0 GeV/c and −0.45<xF<0.6 respectively. The data are compared with leading order QCD calculations.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


THE OBSERVATION OF THE ASYMMETRY IN THE REACTION pi- polarized p ---> pi0 X AT THE ANGLE 90-degrees IN cms AT 40-GeV/c

Vasiliev, A.N. ; Matulenko, Yu.A. ; Meshchanin, A.P. ; et al.
60-66, 1984.
Inspire Record 206936 DOI 10.17182/hepdata.40968

None

1 data table
Table 1

No description provided.


Inclusive $\pi^0$ Production in 250-{GeV}/$c \pi^- p$ Interactions

Diamond, R.N. ; Hagopian, S. ; Hays, P.J. ; et al.
Phys.Rev.D 25 (1982) 41, 1982.
Inspire Record 11137 DOI 10.17182/hepdata.23973

Neutral-pion production in 250-GeV/c π−p interactions are studied using the Fermilab 15-ft bubble chamber. The mean number of neutral pions produced is 3.54±0.15 per inelastic collision and a fit to a linear dependence on the charged multiplicity gives 〈n0〉=1.30+0.56n−. The π0 transverse- and longitudinal-momentum distributions are obtained from the inclusive γ-ray data and compared with the distribution obtained from those π0's which have both decay γ rays converting in the bubble chamber.

1 data table
Table 1

PI0 MEAN MULTIPLICITY IS OBTAINED FROM SIG(PI0,BACKGROUND CORRECTED)=70.8+-8.3 MB. THE NON-CORRECTED BACKGROUD SIG(PI0)=75.7+-3.2 MB AND < PI0 >=3.54+-0.15.