Study of the $e^+e^-\to K^+K^-$ reaction in the energy range from 2.6 to 8.0 GeV

The BaBar collaboration Lees, J.P. ; Poireau, V. ; Tisserand, V. ; et al.
Phys.Rev.D 92 (2015) 072008, 2015.
Inspire Record 1383130 DOI 10.17182/hepdata.73784

The $e^+e^-\to K^+K^-$ cross section and charged-kaon electromagnetic form factor are measured in the $e^+e^-$ center-of-mass energy range ($E$) from 2.6 to 8.0 GeV using the initial-state radiation technique with an undetected photon. The study is performed using 469 fb$^{-1}$ of data collected with the BABAR detector at the PEP-II $e^+e^-$ collider at center-of-mass energies near 10.6 GeV. The form factor is found to decrease with energy faster than $1/E^2$, and approaches the asymptotic QCD prediction. Production of the $K^+K^-$ final state through the $J/\psi$ and $\psi(2S)$ intermediate states is observed. The results for the kaon form factor are used together with data from other experiments to perform a model-independent determination of the relative phases between single-photon and strong amplitudes in $J/\psi$ and $\psi(2S)\to K^+K^-$ decays. The values of the branching fractions measured in the reaction $e^+e^- \to K^+K^-$ are shifted relative to their true values due to interference between resonant and nonresonant amplitudes. The values of these shifts are determined to be about $\pm5\%$ for the $J/\psi$ meson and $\pm15\%$ for the $\psi(2S)$ meson.

1 data table

The $K^+K^-$ invariant-mass interval ($M_{K^+K^-}$), number of selected events ($N_{\rm sig}$) after background subtraction, detection efficiency ($\varepsilon$), ISR luminosity ($L$), measured $e^+e^-\to K^+K^-$ cross section ($\sigma_{K^+K^-}$), and the charged-kaon form factor ($|F_K|$). For the number of events and cross section. For the form factor, we quote the combined uncertainty. For the mass interval 7.5 - 8.0 GeV/$c^2$, the 90$\%$ CL upper limits for the cross section and form factor are listed.


Measurement of $e^+e^- \to \gamma\chi_{cJ}$ via initial state radiation at Belle

The Belle collaboration Han, Y.L. ; Wang, X.L. ; Yuan, C.Z. ; et al.
Phys.Rev.D 92 (2015) 012011, 2015.
Inspire Record 1376480 DOI 10.17182/hepdata.73745

The process $e^+e^- \to \gamma\chi_{cJ}$ ($J$=1, 2) is studied via initial state radiation using 980 fb$^{-1}$ of data at and around the $\Upsilon(nS)$ ($n$=1, 2, 3, 4, 5) resonances collected with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. No significant signal is observed except from $\psi(2S)$ decays. Upper limits on the cross sections between $\sqrt{s}=3.80$ and $5.56~{\rm GeV}$ are determined at the 90% credibility level, which range from few pb to a few tens of pb. We also set upper limits on the decay rate of the vector charmonium [$\psi(4040$), $\psi(4160)$, and $\psi(4415)$] and charmoniumlike [$Y(4260)$, $Y(4360)$, and $Y(4660)$] states to $\gamma\chi_{cJ}$.

3 data tables

Upper limits on the $e^+e^-\to \gamma\chi_{cJ}$ cross sections.

Upper limits on $\Gamma_{ee} \times \mathcal{B}$ at the 90$\%$ C.L.

Upper limits on branching fractions $\mathcal{B}(R \to \gamma \chi_{cJ})$ at the 90$\%$ C.L.


LAMBDA (1520) PRODUCTION IN NEUTRON - NUCLEON INTERACTIONS AT approximately 40-GeV NEUTRON ENERGY

Krastev, V.R. ; Aleev, A.N. ; Arefev, V.A. ; et al.
JINR-P1-88-31, 1988.
Inspire Record 261871 DOI 10.17182/hepdata.9450

None

6 data tables

AVERAGE OVER ALL TARGETS.

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PRODUCTION OF K*+- (1385) AND SIGMA*+- (1385) AND anti-SIGMA*+- (1385) RESONANCES IN pi- p INTERACTIONS AT 40-GeV/c

Kladnitskaya, E.N. ; Popova, V.M. ; Toneeva, G.P. ;
Sov.J.Nucl.Phys. 38 (1983) 75, 1983.
Inspire Record 181383 DOI 10.17182/hepdata.9946

None

7 data tables

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Inclusive Strange Particle Production in $\pi^+ p$ Interactions at 32-{GeV}/$c$

Azhinenko, I.V. ; Belokopytov, Yu.A. ; Borovikov, A.A. ; et al.
Nucl.Phys.B 165 (1980) 1-18, 1980.
Inspire Record 141734 DOI 10.17182/hepdata.8000

The production of K s 0 , Λ and Λ is measured in π + p interactions at 32 GeV/ c . The total inclusive cross sections are found to be 2.07±0.14, 1.00±0.10 and 0.14±0.04 mb, respectively. The energy dependence of total inclusive cross sections and inclusive distributions is discussed and a comparison is made with p, p , K + and K − induced reactions. We find that the factorization hypothesis is satisfied for the inclusive reactions π + p→ Λ X and K + p→ Λ X. Multi-strange-particle production is similar in π + p and K + p interactions at 32 GeV/ c . There is evidence for beam fragmentation in Λ production. The hierarchy of Λ inclusive cross sections in p , K + , π + and K − induced reactions at 32 GeV/ c is qualitatively explained by a quark recombination model. The cross sections for inclusive K ∗ + (892) and Σ + (1385) production in 32 GeV/ c π + p interactions are 1.07±0.57 mb and 0.19±0.08 mb, respectively.

12 data tables

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STUDY OF QUASI TWO-BODY CHANNELS OF THE REACTION K+ p ---> K0 p pi+ AT 32-GeV/c

Chliapnikov, P.V. ; Shoshiashvili, Sh.S. ; Gerdyukov, L.N. ; et al.
Sov.J.Nucl.Phys. 45 (1987) 836, 1987.
Inspire Record 233156 DOI 10.17182/hepdata.10669

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3 data tables

Axis error includes +- 0.0/0.0 contribution (?////NO DECLAIRED SE.DECAY-BR(BRN=K*(892)+ --> K0 PI+,C=PDG 84)//DECAY-BR(BRN=K2*(1430) --> KAON PION,C=PDG 84)//RES-DEF(RES=K*(892)+,BACK=CORRECTED,DEF=0.72 < M(K0 PI+) < 1.20 GEV,C=M AND W FROM PDG 84)//RES-DEF(RES=K2*(1430)+,BACK=CORRECTED,DEF=1.30 < M(K0 PI+) < 1.68 GEV,C=M AND W FROM PDG 84)//RES-DEF(RES=DEL++,BACK=CORRECTED,DEF= M(P PI+) < 1.6 GEV,C=M AND W FROM PDG 84)).

Axis error includes +- 0.0/0.0 contribution (?////NO DECLAIRED SE.DECAY-BR(BRN=K*(892)+ --> K0 PI+,C=PDG 84)//DECAY-BR(BRN=K2*(1430) --> KAON PION,C=PDG 84)//RES-DEF(RES=K*(892)+,BACK=CORRECTED,DEF=0.72 < M(K0 PI+) < 1.20 GEV,C=M AND W FROM PDG 84)//RES-DEF(RES=K2*(1430)+,BACK=CORRECTED,DEF=1.30 < M(K0 PI+) < 1.68 GEV,C=M AND W FROM PDG 84)//RES-DEF(RES=DEL++,BACK=CORRECTED,DEF= M(P PI+) < 1.6 GEV,C=M AND W FROM PDG 84)).

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

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Neutral Strange Particle Production in $K^+ p$ Interactions

The CERN-Soviet collaboration Ajinenko, I.V. ; Chliapnikov, P.V. ; Falaleev, V.P. ; et al.
Z.Phys.C 23 (1984) 307, 1984.
Inspire Record 193424 DOI 10.17182/hepdata.10722

The production properties ofKs0,\(\bar \Lambda\) andK+p interactions at 32 GeV/c are investigated using the final statistics of the experiment. We present total and semi-inclusive cross sections and aver-age multiplicities. Estimates are given of the diffractive dissociation contributions to total and differential cross sections. Thex-,pT−, and transverse mass dependence of inclusive and semi-inclusive distributions is discussed as well as properties of “prompt”Ks0's. The ratio of “prompt”K890+ (K8900) to “prompt”K0 cross sections is measured to be 1.03±0.12 (0.98±0.17). From a comparison of\(\bar \Lambda\) production inK±p interactions at 32 GeV/c, we estimate a strange sea-quark suppression of 0.26 ±0.02. The double differential cross sections ofKs0's is studied as a function of Feynman-x andpT2, and a Triple-Regge fit performed. The data are compared in detail to versions of the Lund-model for low-pT hadronic collisions.

27 data tables

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INCLUSIVE K0(S) LAMBDA, K0(S) anti-LAMBDA AND LAMBDA anti-LAMBDA PAIR PRODUCTION IN K+ p INTERACTIONS AT 32-GeV/c

The Soviet-CERN collaboration Azhinenko, I.V. ; Vorobev, A.P. ; Garuchava, Z.Sh. ; et al.
Sov.J.Nucl.Phys. 41 (1985) 593, 1985.
Inspire Record 205770 DOI 10.17182/hepdata.10701

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14 data tables

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GENERAL FEATURES AND CLUSTER - LIKE PROPERTIES OF REACTION K+ p ---> K+ p 2 pi+ 2 pi- AT 32-GeV/c

Azhinenko, I.V. ; Belokopytov, Yu.A. ; Chliapnikov, P.V. ; et al.
Sov.J.Nucl.Phys. 34 (1981) 584, 1981.
Inspire Record 165495 DOI 10.17182/hepdata.10705

None

58 data tables

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