Budker, G.I
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rivet Analysis
Measurement of $Z\gamma\gamma$ production in $pp$ collisions at $\sqrt{s}= 13$ TeV with the ATLAS detector

The ATLAS collaboration Aad, Georges ; Abbott, Braden Keim ; Abbott, D.C. ; et al.
Eur.Phys.J.C 83 (2023) 539, 2023.
Inspire Record 2593322 DOI 10.17182/hepdata.132903

Cross-sections for the production of a $Z$ boson in association with two photons are measured in proton$-$proton collisions at a centre-of-mass energy of 13 TeV. The data used correspond to an integrated luminosity of 139 fb$^{-1}$ recorded by the ATLAS experiment during Run 2 of the LHC. The measurements use the electron and muon decay channels of the $Z$ boson, and a fiducial phase-space region where the photons are not radiated from the leptons. The integrated $Z(\rightarrow\ell\ell)\gamma\gamma$ cross-section is measured with a precision of 12% and differential cross-sections are measured as a function of six kinematic variables of the $Z\gamma\gamma$ system. The data are compared with predictions from MC event generators which are accurate to up to next-to-leading order in QCD. The cross-section measurements are used to set limits on the coupling strengths of dimension-8 operators in the framework of an effective field theory.

16 data tables
Table 1

Measured fiducial-level integrated cross-section. NLO predictions from Sherpa 2.2.10 and MadGraph5_aMC@NLO 2.7.3 are also shown. The uncertainty in the predictions is divided into statistical and theoretical uncertainties (scale and PDF+$\alpha_{s}$).

Table 2

Measured unfolded differential cross-section as a function of the leading photon transverse energy $E^{\gamma1}_{\mathrm{T}}$. NLO predictions from Sherpa 2.2.10 and MadGraph5_aMC@NLO 2.7.3 are also shown. The uncertainty in the predictions is divided into statistical and theoretical uncertainties (scale and PDF+$\alpha_{s}$).

Table 3

Measured unfolded differential cross-section as a function of the subleading photon transverse energy $E^{\gamma2}_{\mathrm{T}}$. NLO predictions from Sherpa 2.2.10 and MadGraph5_aMC@NLO 2.7.3 are also shown. The uncertainty in the predictions is divided into statistical and theoretical uncertainties (scale and PDF+$\alpha_{s}$).

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A STUDY OF THE REACTION anti-p n ---> pi- pi- pi+ AT CENTER-OF-MASS ENERGIES BETWEEN 1.9-GeV AND 2.3-GeV

Darling, T. ; Opat, G.I. ; Tovey, S.N. ; et al.
Nuovo Cim.A 79 (1984) 181, 1984.
Inspire Record 14076 DOI 10.17182/hepdata.37516

We have studied the reactions\(\bar pn \to \pi ^ -\pi ^ -\pi ^ +(\pi ^0 )\) at incident momenta between 0.42 and 1.65 GeV/c using two exposures in deuterium-filled bubble chambers. The ratio of the rates for 3π to 4π final states shows a sharp increase at a momentum of about 0.8 GeV/c. A full partial-wave analysis of the 3π final state has been made and complex structure is observed at approximately the same momentum, associated in particular with theJP=3+ final state.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Comparison of Strange Anti-baryon and Strange Meson Production in $K^+ p$ Interactions at 32-{GeV}/$c$

Chliapnikov, P.V. ; Gerdyukov, L.N. ; Khromova, G.N. ; et al.
Z.Phys.C 12 (1982) 99, 1982.
Inspire Record 167341 DOI 10.17182/hepdata.10880

New experimental results are presented on inclusive production properties of\(\bar \Sigma ^{ *+ } \)(1385) and\(\bar \Sigma ^{ *+ } \)(1385) inK+p interactions at 32 GeV/c. The analysis is based on significantly larger statistics than previously available. A comparison is also made of invariantx-distributions ofK0/\(\bar K^0 \),\(\bar \Lambda \) and\(\bar \Xi ^ +\) and of\(\bar \Sigma ^{ *\pm } \)(1385) andK*+(892). These spectra exhibit regularities expected from the quark-recombination picture when it is assumed that the strange mesons and antibaryons are produced off the strange\(\bar s\)-valence-quark in the incidentK+ meson. Transverse momentum distributions are also presented forK*+(892) and\(\bar \Sigma ^{ *\pm } \)(1385) and found to be very similar. The results on strange antibaryon average multiplicities disagree strongly with a recent version of the additive quark model.

32 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Inclusive $K^{*+}$(1430), $K^{*0}$(1430) and $F(1270)$ Production in $K^+ p$ Interactions at 32-{GeV}/$c$

Chliapnikov, P.V. ; Falaleev, V.P. ; Gerdyukov, L.N. ; et al.
Z.Phys.C 12 (1982) 113, 1982.
Inspire Record 167340 DOI 10.17182/hepdata.10914

Results are presented on total and semiinclusive cross sections, longitudinal and transverse momentum distributions of the tensor mesonsK*+(1430),K*0(1430), andf(1270) observed inK+p interactions at 32 GeV/c. The data are compared withK*+(892).K*0(896) and ϱ0 vector meson production in the same experiment. The shapes of inclusive invariantx-spectra for the strange vector and tensor mesons are found to be rather similar, after removal of diffractive and quasi-two-body channels, in agreement with quark-recombination ideas.

21 data tables
Table 1

MULT FOR THE TENSOR MESONS CALCULATED AS MULT=SIG(RES)/SIG(N<=8), WHERE SIG(N<=8) IS THE SUM OF TOPOLOGICAL CROSS SECTIONS WITH N <= 8.

Table 2

No description provided.

Table 3

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Inclusive Production of $\Delta^{++}$(1232) and $\Sigma^\pm$(1385) in $K^+ p$ Interactions at 32-{GeV}/$c$

The Soviet-CERN collaboration Azhinenko, I.V. ; Barth, M. ; Belokopytov, Yu.A. ; et al.
IFVE-80-129, 1980.
Inspire Record 156508 DOI 10.17182/hepdata.41431

None

9 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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