Direct measurement of the cross sections for , and production by annihilation at the center-of-mass energy

2005 ◽  
Author(s):  
M ABLIKIM ◽  
J BAI ◽  
Y BAN ◽  
J BIAN ◽  
X CAI ◽  
...  
Keyword(s):  
Direct Measurement ◽  
Cross Sections ◽  
Center Of Mass ◽  
Mass Energy ◽  
Center Of Mass Energy ◽  
The Cross

Direct measurement of the cross sections for , and production by annihilation at the center-of-mass energy

2005 ◽  
Vol 727 (1-2) ◽  
pp. 395-405 ◽  
Author(s):  
M. Ablikim ◽  
J.Z. Bai ◽  
Y. Ban ◽  
J.G. Bian ◽  
X. Cai ◽  
...  
Keyword(s):  
Direct Measurement ◽  
Cross Sections ◽  
Center Of Mass ◽  
Mass Energy ◽  
Center Of Mass Energy ◽  
The Cross

scholarly journals Study of π+π−π+π− production with CMD-3 detector at the VEPP-2000 collider

2019 ◽  
Vol 212 ◽  
pp. 04009
Author(s):  
A. A. Korobov ◽  
R. R. Akhmetshin ◽  
A. N. Amirkhanov ◽  
A. V. Anisenkov ◽  
V. M. Aulchenko ◽  
...  
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Anomalous Magnetic Moment ◽  
Center Of Mass ◽  
Vector Current ◽  
Precision Measurements ◽  
Mass Energy ◽  
Muon Anomalous Magnetic Moment ◽  
Center Of Mass Energy ◽  
The Cross

The cross section of the process e+e−→ π+π−π+π− has been measured using an integrated luminosity of 17 pb−1 collected with the CMD-3 detector in the center-of-mass energy range 650-1000 MeV. High-precision measurements of various hadronic cross sections are of great interest in relation with the problem of the muon anomalous magnetic moment g-2. This measurement can be also used to test the relation between the cross section of e+e−→ π+ π−π+ π− and the spectral function for the τ−→ π−π0π0π0 decay predicted by the conservation of vector current (CVC).

scholarly journals Proton Spectra from He3+T and He3+He3 Fusion at Low Center-of-Mass Energy, with Potential Implications for Solar Fusion Cross Sections

2017 ◽  
Vol 119 (22) ◽  
Author(s):  
A. B. Zylstra ◽  
J. A. Frenje ◽  
M. Gatu Johnson ◽  
G. M. Hale ◽  
C. R. Brune ◽  
...  
Keyword(s):  
Cross Sections ◽  
Center Of Mass ◽  
Mass Energy ◽  
Center Of Mass Energy

scholarly journals Measurements of the vector boson production with the ATLAS detector

2018 ◽  
Vol 172 ◽  
pp. 03001
Author(s):  
A. Lapertosa
Keyword(s):  
Perturbative Qcd ◽  
High Precision ◽  
Cross Sections ◽  
Center Of Mass ◽  
Atlas Collaboration ◽  
Mass Energy ◽  
Ratio Measurement ◽  
Center Of Mass Energy ◽  
Proton Structure ◽  
8 Tev

Measurements of the Drell-Yan production of W and Z bosons at the LHC provide a benchmark of our understanding of perturbative QCD and probe the proton structure in a unique way. The ATLAS collaboration has performed new high precision measurements at a center-of-mass energy of 7 TeV. The measurements are performed for W+, W- and Z bosons integrated and as a function of the boson or lepton rapidity and the Z mass. Unprecedented precision is reached and strong constraints on Parton Distribution Functions, in particular the strange density are found. Z boson cross sections are also measured at center-of-mass energies of 8 TeV and 13 TeV, and cross-section ratios to the top-quark pair production have been derived. This ratio measurement leads to a cancellation of systematic effects and allows for a high precision comparison to the theory predictions. The production of jets in association with vector bosons is a further important process to study perturbative QCD in a multi-scale environment. The ATLAS collaboration has performed new measurements of Z boson plus jets cross sections, differential in several kinematic variables, in proton-proton collision data taken at a center-of-mass energy of 13 TeV. The measurements are compared to state-of-the art theory predictions. They are sensitive to higher-order pQCD effects, probe flavour and mass schemes and can be used to constrain the proton structure. In addition, a new measurement of the splitting scales of the kt jet-clustering algorithm for final states containing a Z boson candidate at a center-of-mass energy of 8 TeV is presented.

scholarly journals Study of the e+e−→ KS KLπ0 process up to 2 GeV with the CMD-3 detector at the VEPP-2000 collider

2019 ◽  
Vol 212 ◽  
pp. 04008
Author(s):  
A. V. Semenov ◽  
R. R. Akhmetshin ◽  
A. N. Amirkhanov ◽  
A. V. Anisenkov ◽  
V. M. Aulchenko ◽  
...  
Keyword(s):  
Total Cross Section ◽  
Energy Range ◽  
Cross Section ◽  
Center Of Mass ◽  
Mass Energy ◽  
Preliminary Results ◽  
Center Of Mass Energy ◽  
Electron Positron ◽  
The Cross

The cross section of the process e+ e−→ KS KL π0 has been studied with the CMD-3 detector at the VEPP-2000 electron-positron collider in the center-of-mass energy range from 1.1 to 2 GeV. Preliminary results on the total cross section of the process are presented.

scholarly journals Prompt production of the hidden charm pentaquarks in the LHC

2021 ◽  
Vol 81 (9) ◽  
Author(s):  
Pan Ling ◽  
Xiao-Hu Dai ◽  
Meng-Lin Du ◽  
Qian Wang
Keyword(s):  
Heavy Quark ◽  
Cross Sections ◽  
Center Of Mass ◽  
Lhcb Collaboration ◽  
Relative Strength ◽  
Data Set ◽  
Center Of Mass Energy ◽  
Quark Spin ◽  
Order Of Magnitude ◽  
The Cross

AbstractMotivated by the observation of the first hidden charm pentaquarks by the LHCb collaboration in 2015 and the updated analysis with an order-of-magnitude larger data set in 2019, we estimate their cross sections for the prompt production as well as their heavy quark spin partners, in the $$\Sigma _c^{(*)}\bar{D}^{(*)}$$ Σ c ( ∗ ) D ¯ ( ∗ ) hadronic molecular picture, at the center-of-mass energy $$7~\text {TeV}$$ 7 TeV in the pp collision. Their cross sections are several $${\mathrm {nb}}$$ nb and we would expect several tens hidden charm pentaquark events in the LHC based on its current integrated luminosity. The cross sections show a sizable deviation of the cross sections for hidden charm pentaquarks with the third isospin component $$I_z=+\frac{1}{2}$$ I z = + 1 2 ($$P_c^+$$ P c + ) from those with $$I_z=-\frac{1}{2}$$ I z = - 1 2 ($$P_c^0$$ P c 0 ). The cross sections decrease dramatically with the increasing transverse momentum. Our study can also tell where to search for the missing hidden charm pentaquarks. The confirmation of the complete hidden charm pentaquarks in the heavy quark symmetry would further verify their $$\Sigma _c^{(*)}\bar{D}^{(*)}$$ Σ c ( ∗ ) D ¯ ( ∗ ) molecular interpretation. In addition, the relative strength among these cross sections for pentaquarks can help us to identify the quantum numbers of the $$P_c(4440)$$ P c ( 4440 ) and $$P_c(4457)$$ P c ( 4457 ) .

Measurement of total and partial photon proton cross sections at 180 GeV center of mass energy

1994 ◽  
Vol 63 (3) ◽  
pp. 391-408 ◽  
Author(s):  
◽  
M. Derrick ◽  
D. Krakauer ◽  
S. Magill ◽  
B. Musgrave ◽  
...  
Keyword(s):  
Cross Sections ◽  
Center Of Mass ◽  
Mass Energy ◽  
Center Of Mass Energy
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