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Comparison of the Z/$\gamma$$^{∗}$ + jets to $\gamma$ + jets cross sections in pp collisions at $ \sqrt{s}=8 $ TeV

The CMS collaboration Khachatryan, Vardan ; Sirunyan, Albert M ; Tumasyan, Armen ; et al.
JHEP 1510 (2015) 128, 2015.
Inspire Record 1372730 DOI 10.17182/hepdata.72989

A comparison of the differential cross sections for the processes Z/γ$^{*}$ + jets and photon (γ)+jets is presented. The measurements are based on data collected with the CMS detector at $ \sqrt{s}=8 $ TeV corresponding to an integrated luminosity of 19.7 fb$^{−1}$. The differential cross sections and their ratios are presented as functions of p$_{T}$. The measurements are also shown as functions of the jet multiplicity. Differential cross sections are obtained as functions of the ratio of the Z/γ$^{*}$ p$_{T}$ to the sum of all jet transverse momenta and of the ratio of the Z/γ$^{*}$ p$_{T}$ to the leading jet transverse momentum. The data are corrected for detector effects and are compared to simulations based on several QCD calculations.

14 data tables

The Z boson differential transverse momentum cross-section in an inclusive $Z/\gamma^{*}+\mathrm{jets}$, $N_{\mathrm{jets}} \geq1$ selection.

The $\gamma$ differential transverse momentum cross-section in an inclusive $\gamma+\mathrm{jets}$, $N_{\mathrm{jets}} \geq1$ selection for central rapidities $\vert y_{\gamma} \vert > 1.4$.

The Z boson differential transverse momentum cross-section in an inclusive $Z/\gamma^{*}+\mathrm{jets}$, $N_{\mathrm{jets}} \geq2$ selection.

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The Reaction $p + p \rightarrow p + p + {\pi}^0$ in the Energy Range from Threshold to 665 MeV

Dunaitsev, A.F. ; Prokoshkin, Yu.D. ;
Sov.Phys.JETP 9 (1959) 1179, 1959.
Inspire Record 1408597 DOI 10.17182/hepdata.70460
2 data tables

No description provided.

No description provided.


Inclusive photon production at forward rapidities in proton-proton collisions at $\sqrt{s}$ = 0.9, 2.76 and 7 TeV

The ALICE collaboration Abelev, Betty Bezverkhny ; Adam, Jaroslav ; Adamova, Dagmar ; et al.
Eur.Phys.J. C75 (2015) 146, 2015.
Inspire Record 1328669 DOI 10.17182/hepdata.69495

The multiplicity and pseudorapidity distributions of inclusive photons have been measured at forward rapidities ( $2.3 < \eta < 3.9$ ) in proton–proton collisions at three center-of-mass energies, $\sqrt{s}$   $=$ 0.9, 2.76 and 7 TeV using the ALICE detector. It is observed that the increase in the average photon multiplicity as a function of beam energy is compatible with both a logarithmic and a power-law dependence. The relative increase in average photon multiplicity produced in inelastic pp collisions at 2.76 and 7 TeV center-of-mass energies with respect to 0.9 TeV are 37.2 $\pm $ 0.3 % (stat) $\pm $ 8.8 % (sys) and 61.2 $\pm $ 0.3 % (stat) $\pm $ 7.6 % (sys), respectively. The photon multiplicity distributions for all center-of-mass energies are well described by negative binomial distributions. The multiplicity distributions are also presented in terms of KNO variables. The results are compared to model predictions, which are found in general to underestimate the data at large photon multiplicities, in particular at the highest center-of-mass energy. Limiting fragmentation behavior of photons has been explored with the data, but is not observed in the measured pseudorapidity range.

8 data tables

Photon multiplicity distribution for INEL proton-proton collisions at sqrt(s)=0.9 TeV.

Photon multiplicity distribution for INEL proton-proton collisions at sqrt(s)=2.76 TeV.

Photon multiplicity distribution for INEL proton-proton collisions at sqrt(s)=7 TeV.

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Measurement of the Cross Section for Prompt Isolated Diphoton Production Using the Full CDF Run II Data Sample

The CDF collaboration Aaltonen, T. ; Amerio, S. ; Amidei, D. ; et al.
Phys.Rev.Lett. 110 (2013) 101801, 2013.
Inspire Record 1207879 DOI 10.17182/hepdata.66020

This Letter reports a measurement of the cross section for producing pairs of central prompt isolated photons in proton-antiproton collisions at a total energy of 1.96 TeV using data corresponding to 9.5/fb integrated luminosity collected with the CDF II detector at the Fermilab Tevatron. The measured differential cross section is compared to three calculations derived from the theory of strong interactions. These include a prediction based on a leading order matrix element calculation merged with parton shower, a next-to-leading order, and a next-to-next-to-leading order calculation. The first and last calculations reproduce most aspects of the data, thus showing the importance of higher-order contributions for understanding the theory of strong interaction and improving measurements of the Higgs boson and searches for new phenomena in diphoton final states.

23 data tables

The measured differential cross sections for $M_{\gamma\gamma}$ , together with the predictions from the Sherpa and NNLO Monte Carlos.

The measured differential cross sections for $M_{\gamma\gamma}$ when $P_T > M_{\gamma\gamma}$ , together with the predictions from the Sherpa and NNLO Monte Carlos.

The measured differential cross sections for $M_{\gamma\gamma}$ when $P_T < M_{\gamma\gamma}$ , together with the predictions from the Sherpa and NNLO Monte Carlos.

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Measurement of isolated photon production in $pp$ and PbPb collisions at $\sqrt{s_{NN}}=2.76$ TeV

The CMS collaboration Chatrchyan, Serguei ; Khachatryan, Vardan ; Sirunyan, Albert M ; et al.
Phys.Lett. B710 (2012) 256-277, 2012.
Inspire Record 1084729 DOI 10.17182/hepdata.58979

Isolated photon production is measured in proton-proton and lead-lead collisions at nucleon-nucleon centre-of-mass energies of 2.76 TeV in the pseudorapidity range |eta|<1.44 and transverse energies ET between 20 and 80 GeV with the CMS detector at the LHC. The measured ET spectra are found to be in good agreement with next-to-leading-order perturbative QCD predictions. The ratio of PbPb to pp isolated photon ET-differential yields, scaled by the number of incoherent nucleon-nucleon collisions, is consistent with unity for all PbPb reaction centralities.

6 data tables

Isolated photon spectra for PB PB collisions in 3 centrality ranges.

Isolated photon spectra for PB PB collisions in the full centrality range.

Isolated photon spectra for P P collisions.

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Measurement of the Differential Cross Section for Isolated Prompt Photon Production in pp Collisions at 7 TeV

The CMS collaboration Chatrchyan, Serguei ; Khachatryan, Vardan ; Sirunyan, Albert M ; et al.
Phys.Rev. D84 (2011) 052011, 2011.
Inspire Record 922830 DOI 10.17182/hepdata.58958

A measurement of the differential cross section for the inclusive production of isolated prompt photons in proton-proton collisions at a centre-of-mass energy of 7 TeV is presented. The data sample corresponds to an integrated luminosity of 36 inverse picobarns recorded by the CMS detector at the LHC. The measurement covers the pseudorapidity range |eta|<2.5 and the transverse energy range 25 < ET < 400 GeV, corresponding to the kinematic region 0.007 < xT < 0.114. Photon candidates are identified with two complementary methods, one based on photon conversions in the silicon tracker and the other on isolated energy deposits in the electromagnetic calorimeter. The measured cross section is presented as a function of ET in four pseudorapidity regions. The next-to-leading-order perturbative QCD calculations are consistent with the measured cross section.

2 data tables

The measured prompt photon production spectra in the two |eta| regions, 0.0-0.9 and 0.9-1.44.

The measured prompt photon production spectra in the two |eta| regions, 1.57-2.1 and 2.1-2.5.


Measurement of the Isolated Prompt Photon Production Cross Section in $pp$ Collisions at $\sqrt{s} = 7$~TeV

The CMS collaboration Khachatryan, Vardan ; Sirunyan, Albert M. ; Tumasyan, Armen ; et al.
Phys.Rev.Lett. 106 (2011) 082001, 2011.
Inspire Record 879403 DOI 10.17182/hepdata.63810
1 data table

Measured isolated prompt photon differential cross section.


Measurement of direct photon production at Tevatron fixed target energies

The Fermilab E706 collaboration Apanasevich, L. ; Bacigalupi, J. ; Baker, W. ; et al.
Phys.Rev. D70 (2004) 092009, 2004.
Inspire Record 653834 DOI 10.17182/hepdata.42777

Measurements of the production of high transverse momentum direct photons by a 515 GeV/c piminus beam and 530 and 800 GeV/c proton beams in interactions with beryllium and hydrogen targets are presented. The data span the kinematic ranges of 3.5 < p_T < 12 GeV/c in transverse momentum and 1.5 units in rapidity. The inclusive direct-photon cross sections are compared with next-to-leading-order perturbative QCD calculations and expectations based on a phenomenological parton-k_T model.

18 data tables

Invariant cross sections per nucleon for P BE collisions at 800 GeV.

Invariant cross sections per nucleon for P BE collisions at 530 GeV.

Invariant cross sections per nucleon for PI- BE collisions at 515 GeV.

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A New determination of $\alpha_s$ using direct photon production cross-sections in $p p$ and $\bar{p} p$ collisions at $S^{(1/2)}$ = 24.3-GeV

The UA6 collaboration Werlen, M. ; Ballocchi, G. ; Breedon, R.E. ; et al.
Phys.Lett. B452 (1999) 201-206, 1999.
Inspire Record 496157 DOI 10.17182/hepdata.34551
1 data table

Value of LAMBDA(MSBAR) and ALPHAS at MZ**2 deduced from the difference in the pbar and p direct photon cross sections. The second systematic error is due to the uncertainties in the theory.


Direct photon cross-sections in proton proton and anti-proton - proton interactions at S**(1/2) = 24.3-GeV

The UA6 collaboration Ballocchi, G. ; Breedon, R.E. ; Camilleri, L. ; et al.
Phys.Lett. B436 (1998) 222-230, 1998.
Inspire Record 476703 DOI 10.17182/hepdata.49311
1 data table

PI0 cross sections. Direct photon cross section and pbar-p/p-p difference.


Measurement of single spin asymmetry for direct photon production in p p collisions at 200-GeV/c

The E704 collaboration Adams, D.L. ; Akchurin, N. ; Belikov, N.I. ; et al.
Phys.Lett. B345 (1995) 569-575, 1995.
Inspire Record 399938 DOI 10.17182/hepdata.28766
2 data tables

No description provided.

No description provided.


Direct photon production in $\bar{p} p$ and $p p$ interactions at $\sqrt{s}$ = 24.3-GeV

The UA6 collaboration Sozzi, G. ; Ballocchi, G. ; Bernasconi, A. ; et al.
Phys.Lett. B317 (1993) 243-249, 1993.
Inspire Record 358422 DOI 10.17182/hepdata.28782
4 data tables

No description provided.

No description provided.

No description provided.

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gamma production in p Ne-20 and p N interactions at 300-GeV

Yuldashev, B.S. ; Aliev, Sh.M. ; Alimov, M.A. ; et al.
Phys.Rev. D43 (1991) 2803-2814, 1991.
Inspire Record 299846 DOI 10.17182/hepdata.22850

Data on the multiplicity and inclusive spectra of γ produced in inelastic pNe20 and pN interactions at 300 GeV are presented. The γ multiplicity for pNe20 interactions is 11.43±0.23, and the ratio of 〈nγ〉 for pNe20 and pN interactions is 1.48±0.05. From an analysis of the effective-mass distributions, 〈nπ0〉=4.91±0.52 and 〈nη0〉=1.47±0.33. In fact, η0 production is much higher in pNe20 interactions [R(η0π0)=0.66±0.12 for np≥21] than in pN interactions [R(η0π0)=0.06±0.04]. No η′(958) signal is seen. Strong correlations between 〈nγ〉 and np, the number of secondary protons, are observed, primarily from the central and target fragmentation regions. Inclusive y* and p⊥ spectra are analyzed and evidence for low-energy cascading and rescattering of fast particles in the projectile fragmentation region is discussed. The data are compared to the predictions of the additive quark model, the Lund model, and the dual parton model.

9 data tables

No description provided.

GAMMA-MULTIPLICITY FOR (PROTON-NUCLEON)-INTERACTION WAS OBTAINED AT AVERAGING OVER (PP) AND (PN) EVENTS, AND THEN WAS USED IN THE PRESENTED RATIO.

No description provided.

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Direct Photon Production at the {CERN} {ISR}

The CMOR collaboration Angelis, A.L.S. ; Basini, G. ; Besch, H.J. ; et al.
Nucl.Phys. B327 (1989) 541-568, 1989.
Inspire Record 279988 DOI 10.17182/hepdata.33181
3 data tables

Final Average Results from inside and outside detector.

Results for the inside detector.

Results for the outside detector.


High $p_T \gamma$ and $\pi^0$ Production, Inclusive and With a Recoil Hadronic Jet, in $p p$ Collisions at $\sqrt{s}=63$-{GeV}

The Axial Field Spectrometer collaboration Akesson, T. ; Albrow, M.G. ; Almehed, S. ; et al.
Sov.J.Nucl.Phys. 51 (1990) 836-845, 1990.
Inspire Record 281284 DOI 10.17182/hepdata.48816
3 data tables

Errors are combined statistical and systematic.

Errors are combined statistical and systematic.

Errors are combined statistical and systematic.


Production of High Transverse Momentum Prompt Photons and Neutral Pions in Proton Proton Interactions at 280-GeV/c

The WA70 collaboration Bonesini, M. ; Bonvin, E. ; Booth, P.S.L. ; et al.
Z.Phys. C38 (1988) 371, 1988.
Inspire Record 252633 DOI 10.17182/hepdata.15647
6 data tables

Invariant cross section.

No description provided.

Invariant cross section.

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A Measurement of Direct Photon 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. D36 (1987) 8, 1987.
Inspire Record 236248 DOI 10.17182/hepdata.23324
1 data table

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


Search for Direct $\gamma$ Production at Low Transverse Momentum in 63-{GeV} $p p$ Collisions

The Axial Field Spectrometer collaboration Akesson, T. ; Albrow, M.G. ; Almehed, S. ; et al.
Phys.Rev. D36 (1987) 2615, 1987.
Inspire Record 246577 DOI 10.17182/hepdata.23325
1 data table

No description provided.


DIFFERENCES BETWEEN ANTI-P P AND P P INTERACTIONS AT 8.8-GeV/c AND THEIR RELATIONSHIP TO ANTI-P P ANNIHILATIONS

Booth, C.n. ; Ansorge, R.e. ; Carter, J.r. ; et al.
Phys.Rev. D27 (1983) 2018, 1983.
Inspire Record 194364 DOI 10.17182/hepdata.23838
27 data tables

No description provided.

No description provided.

No description provided.

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Correlations Between Neutral and Charged Pions Produced in 300-{GeV}/$c p p$ Collisions

Kafka, T. ; LoPinto, F. ; Brody, A. ; et al.
Phys.Rev. D19 (1979) 76, 1979.
Inspire Record 6901 DOI 10.17182/hepdata.24255

Neutral-pion production in pp interactions has been studied using 8000 photon conversions in the Fermilab 15-ft bubble chamber. Inclusive π0 multiplicity moments and ππ correlation integrals are presented; f200 is determined to be + 3.0±0.8. For the semi-inclusive π0 multiplicity distributions we find 〈n(π0)〉n− to increase with n−, while the dispersions are n− independent. Results on f2−0, f200, and f2,n−00 are compared to predictions of simple cluster models.

3 data tables

No description provided.

No description provided.

No description provided.


Direct Production of High p_T Single Photons at the CERN Intersecting Storage Rings

The Athens-Athens-Brookhaven-CERN collaboration Diakonou, M. ; Kourkoumelis, C. ; Resvanis, L.K. ; et al.
Phys.Lett. B87 (1979) 292-296, 1979.
Inspire Record 143254 DOI 10.17182/hepdata.27293
1 data table

No description provided.


High $p_T$ Direct Photon Production at 11-degrees in $p p$ Collisions at $\sqrt{s}=63$-{GeV}

The Axial Field Spectrometer collaboration Akesson, T. ; Albrow, M.G. ; Almehed, S. ; et al.
Phys.Lett. B123 (1983) 367-372, 1983.
Inspire Record 188929 DOI 10.17182/hepdata.30744
1 data table

No description provided.


Neutral Particle Production in pi+ p and p p Collisions at 100-GeV/c

Alston-Garnjost, Margaret ; Erwin, J. ; Klems, J.H. ; et al.
Phys.Rev.Lett. 35 (1975) 142, 1975.
Inspire Record 98682 DOI 10.17182/hepdata.21191
8 data tables

No description provided.

No description provided.

No description provided.

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A comparison of direct photon, pi0, and eta production in p anti-p and pp interactions at the CERN ISR

The Axial Field Spectrometer collaboration Akesson, T. ; Albrow, M.G. ; Almehed, S. ; et al.
Phys.Lett. B158 (1985) 282-288, 1985.
Inspire Record 213984 DOI 10.17182/hepdata.30391
5 data tables

No description provided.

No description provided.

No description provided.

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SINGLE DIRECT PHOTON PRODUCTION IN P P COLLISIONS AT S**(1/2) = 53.2-GEV IN THE P(T) INTERVAL 2.3-GEV/C TO 5.7-GEV/C

Amaldi, E. ; Beneventano, M. ; Borgia, B. ; et al.
Nucl.Phys. B150 (1979) 326-344, 1979.
Inspire Record 145596 DOI 10.17182/hepdata.34796
3 data tables

THIS USES THE SO-CALLED D2L TRIGGER (SEE PAPER).

THIS USES THE SO-CALLED D2MAX TRIGGER (SEE PAPER).

THIS USES THE SO-CALLED D2MAX TRIGGER (SEE PAPER).