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Proton-Proton Interactions and Onset of Deconfinement

The NA61/SHINE collaboration Aduszkiewicz, A. ; Andronov, E.V. ; Anticic, T. ; et al.
Phys.Rev.C 102 (2020) 011901, 2020.
Inspire Record 1772241 DOI 10.17182/hepdata.95182

The NA61/SHINE experiment at the CERN SPS is performing a uniqe study of the phase diagram of strongly interacting matter by varying collision energy and nuclear mass number of colliding nuclei. In central Pb+Pb collisions the NA49 experiment found structures in the energy dependence of several observables in the CERN SPS energy range that had been predicted for the transition to a deconfined phase. New measurements of NA61/SHINE find intriguing similarities in p+p interactions for which no deconfinement transition is expected at SPS energies. Possible implications will be discussed.

12 data tables
Table 1

K+/PI+ at y=0.

Table 2

K+/PI+ at y=0.

Table 3

<K+>/<PI+>.

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Energy dependence of forward-rapidity J/$\psi$ and $\psi(2S)$ production in pp collisions at the LHC

The ALICE collaboration Acharya, Shreyasi ; Adamova, Dagmar ; Aggarwal, Madan Mohan ; et al.
Eur.Phys.J.C 77 (2017) 392, 2017.
Inspire Record 1511865 DOI 10.17182/hepdata.77781

We present results on transverse momentum ($p_{\rm T}$) and rapidity ($y$) differential production cross sections, mean transverse momentum and mean transverse momentum square of inclusive J/$\psi$ and $\psi(2S)$ at forward rapidity ($2.5<y<4$) as well as $\psi(2S)$-to-J/$\psi$ cross section ratios. These quantities are measured in pp collisions at center of mass energies $\sqrt{s}=5.02$ and 13 TeV with the ALICE detector. Both charmonium states are reconstructed in the dimuon decay channel, using the muon spectrometer. A comprehensive comparison to inclusive charmonium cross sections measured at $\sqrt{s}=2.76$, 7 and 8 TeV is performed. A comparison to non-relativistic quantum chromodynamics and fixed-order next-to-leading logarithm calculations, which describe prompt and non-prompt charmonium production respectively, is also presented. A good description of the data is obtained over the full $p_{\rm T}$ range, provided that both contributions are summed. In particular, it is found that for $p_{\rm T}>15$ GeV/$c$ the non-prompt contribution reaches up to 50% of the total charmonium yield.

14 data tables
Table 1

Differential production cross sections of $J/\psi$ as a function of $p_{\rm T}$.

Table 2

Differential production cross sections of $J/\psi$ as a function of rapidity.

Table 3

Differential production cross sections of $\psi(2S)$ as a function of $p_{\rm T}$.

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Measurement of $R_{\text{uds}}$ and $R$ between 3.12 and 3.72 GeV at the KEDR detector

Anashin, V.V. ; Aulchenko, V.M. ; Baldin, E.M. ; et al.
Phys.Lett.B 753 (2016) 533-541, 2016.
Inspire Record 1397002 DOI 10.17182/hepdata.76727

Using the KEDR detector at the VEPP-4M $e^+e^-$ collider, we have measured the values of $R_{\text{uds}}$ and $R$ at seven points of the center-of-mass energy between 3.12 and 3.72 GeV. The total achieved accuracy is about or better than $3.3\%$ at most of energy points with a systematic uncertainty of about $2.1\%$. At the moment it is the most accurate measurement of $R(s)$ in this energy range.

1 data table
Table 1

Measured values of $R_{\rm{uds}}(s)$ and $R(s)$ with statistical and systematic uncertainties.


Summary data on elastic $pp$ and $pd$ scattering at small angles and the real part of the $pn$-scattering amplitude in the energy interval 1-10 BeV

Dalkhazhav, N. ; Devinski, P.A. ; Zayachki, V.I. ; et al.
Sov.J.Nucl.Phys. 8 (1969) 196-202, 1969.
Inspire Record 1392874 DOI 10.17182/hepdata.69719

None

32 data tables
Table 1

RE/IM MEASUREMENTS TAKEN FROM TABLE 1 OF KIRILLOVA 65.

Table 2

TABLE 1 (REF. 1 ).

Table 3

RE/IM MEASUREMENTS TAKEN FROM TABLE 1 OF KIRILLOVA 65.

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Total cross sections for interaction of neutrons with protons and neutrons from 2.6 to 8.3 BeV

Pantuev, V.S. ; Khachturyan, M.N. ; Chuvilo, I.V. ;
Sov.J.Nucl.Phys. 1 (1965) 93-99, 1965.
Inspire Record 1392860 DOI 10.17182/hepdata.11

None

2 data tables
Table 1

'1'. '2'. '3'.

Table 2

No description provided.


Forward peak in $\pi^+$ photoproduction

Buschhorn, G. ; Heide, P. ; Kötz, U. ; et al.
Phys.Lett.B 25 (1967) 622-623, 1967.
Inspire Record 1392927 DOI 10.17182/hepdata.29549

The π+—photoproduction cross section is found to have a peak in the forward direction in disagreement with simple Regge pole models.

1 data table
Table 1

No description provided.


Photoproduction of $K^+$ mesons at 3.4 and 5.0 GeV

Joseph, P.M. ; Hicks, H. ; Litt, L. ; et al.
Phys.Lett.B 26 (1967) 41-44, 1967.
Inspire Record 1392746 DOI 10.17182/hepdata.29332

Measurements of the photoproduction from hydrogen of single K + mesons at gamma ray energies of 3.4 and 5.0 GeV and at laboratory angles of 5.1°, 7.1°, 9.9° and 15.1° are reported. The s dependence at fixed t is derived for momentum transfers of −0.25 and −0.37 (GeV) 2 .

2 data tables
Table 1

Axis error includes +- 13/13 contribution (Ovearall systematic uncertainty. Included).

Table 2

Axis error includes +- 13/13 contribution (Ovearall systematic uncertainty. Included).


Investigation of the mechanism of double production of $\Delta_{1236}$ in the reaction $n p\rightarrow np_{\pi^{+}\pi^{-}}$ at energies 2-10 GeV

Gasparyan, A.P. ; Kopylova, D.K. ; Nikitin, A.V. ; et al.
Sov.J.Nucl.Phys. 21 (1975) 69-71, 1975.
Inspire Record 1392571 DOI 10.17182/hepdata.19132

None

2 data tables
Table 1

No description provided.

Table 2

EXOTIC (BACKWARD) EVENTS REMOVED BY SUBTRACTING IMITATION DOUBLE DELTA PRODUCTION DUE TO THE PROCESS N P --> N*(1600)+ <DEL++ PI-> N.


Single photoproduction of neutral $\pi$-mesons on hydrogen at small angles between 4 and 5.8 GeV

Braunschweig, M. ; Braunschweig, W. ; Husmann, D. ; et al.
Phys.Lett.B 26 (1968) 405-409, 1968.
Inspire Record 1389637 DOI 10.17182/hepdata.29336

The differential cross-section of the reaction γ + p → p + π 0 was measured at the Deutsches Elektronen-Synchrotron, Hamburg, at mean photon energies of 4.0, 5.0 and 5.8 GeV and pion center of mass angles between 0° and 60°. The results are compared wiht theoretical calculations based on Reggeized vector meson exchange.

6 data tables
Table 1

Axis error includes +- 7/7 contribution.

Table 2

Axis error includes +- 7/7 contribution.

Table 3

Axis error includes +- 7/7 contribution.

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The transverse and longitudinal cross sections for electroproduction of pions near the Δ(1236)-isobar

Bartel, W. ; Dudelzak, B. ; Krehbiel, H. ; et al.
Phys.Lett.B 27 (1968) 660-662, 1968.
Inspire Record 1389642 DOI 10.17182/hepdata.29204

The reaction e + p → e ′+ N ∗ was studied for four momentum transfers up to 2.34 (GeV/ c ) 2 in the region of the 1236 MeV isobar. An analysis of the data in terms of the cross sections σ T and σ L for the absorption of transverse and longitudinal photons is given for invariant masses of the final pion nucleon system W =1.220 GeV and W =1.350 GeV.

3 data tables
Table 1

Total errors are presented.

Table 2

Total errors are presented.

Table 3

Total errors are presented.