scholarly journals ON A POSSIBLE MANIFESTATION OF THE FOUR-COLOR SYMMETRY Z' BOSON IN μ+μ- EVENTS AT THE LHC

2009 ◽  
Vol 24 (15) ◽  
pp. 1199-1207
Author(s):  
A. D. SMIRNOV ◽  
YU. S. ZAITSEV
Keyword(s):  
Mass Spectrum ◽  
Pair Production ◽  
Invariant Mass ◽  
Cross Section ◽  
Z Boson ◽  
Invariant Mass Spectrum ◽  
Mass Region ◽  
Pp Collisions ◽  
Color Symmetry ◽  
The Cross

The cross section of the μ+μ- pair production in pp-collisions at the LHC is calculated with account of the Z' boson induced by the minimal four-color quark–lepton symmetry (MQLS). The μ+μ- invariant mass spectrum with account of the MQLS Z' boson is analyzed in dependence on the Z' mass. The mass region for the MQLS Z' boson observable at the LHC is found in dependence on the significance and on the integrated luminosity.

THE PROCESSES e+e−→W±H∓AND e+e−→H+H−IN SUPERSTRING INSPIRED EXTRA U(1) MODEL

1990 ◽  
Vol 05 (03) ◽  
pp. 501-514 ◽  
Author(s):  
USHA BHATIA ◽  
N.K. SHARMA
Keyword(s):  
Mass Spectrum ◽  
Invariant Mass ◽  
Cross Section ◽  
Polar Angle ◽  
Invariant Mass Spectrum ◽  
Thrust Axis ◽  
The Cross

We investigate the processes e+e−→W±H∓ and e+e−→H+H− in a superstring inspired model having an additional ZE. The cross section at Z2 resonance for e+e−→W±H∓ are considerably large, giving about a thousand events per day at LEP II energy for the planned luminosity. The invariant mass spectrum for l±vl obtained from W± decay is shown to be distinct and could be decisive in the detection of the process. The cross section for the process e+e−→H+H− is relatively small and may provide around five events per day for the envisaged luminosity. The dominant background problem caused by e+e−→W+W− in both processes may be reduced by applying appropriate cuts on the polar angle of the thrust axis.

WHAT IS THE NATURE OF THE ABC EFFECT?

2011 ◽  
Vol 26 (03n04) ◽  
pp. 627-629
Author(s):  
◽  
M. BASHKANOV ◽  
H. CLEMENT
Keyword(s):  
Mass Spectrum ◽  
Total Cross Section ◽  
Invariant Mass ◽  
Cross Section ◽  
Pion Production ◽  
Invariant Mass Spectrum ◽  
Fusion Reactions ◽  
Nuclear Fusion Reactions ◽  
Low Mass ◽  
Mass Enhancement

The ABC effect — an intriguing low-mass enhancement in the ππ invariant mass spectrum — is known from inclusive measurements of two-pion production in nuclear fusion reactions. Exclusive measurements have been carried out at CELSIUS/WASA and WASA-at-COSY for the fusion reactions leading to d, 3 He and 4 He . They all reveal this effect to be of isoscalar nature and associated with a narrow Lorentzian-shaped structure in the total cross section. The latter could point to the formation of an isoscalar resonance, which couples to the pn channel as well as to an intermediate ΔΔ state.

scholarly journals Nucleon form factors at threshold

2019 ◽  
Vol 218 ◽  
pp. 04003
Author(s):  
Alexandr Milstein
Keyword(s):  
Invariant Mass ◽  
Cross Section ◽  
Cross Sections ◽  
Mass Spectra ◽  
Form Factors ◽  
Invariant Mass Spectrum ◽  
Nucleon Form Factors ◽  
The Cross ◽  
Good Agreement ◽  
Invariant Mass Spectra

The pp¯invariant mass spectra in the processes e+e−→ pp¯, e+e−→ nn¯, J/ψ → pp¯ω, J/ψ → pp¯ρ, and J/ψ → pp¯γ close to the pp¯is discussed. The optical potentials for NN¯pair in the superposition of S and D waves (due to tensor forces) at spin unity of the pair, as well as for NN¯pair in the S wave at spin zero of the pair, are proposed. The parameters of the potentials are obtained by fitting the cross sections of NN¯scattering together with the pp¯invariant mass spectra in e+e−→ pp¯annihilation and J/ψ decays. Good agreement with the available experimental data is achieved. Using our potential and the Green’s function approach we also describe the cross section of e+ e−→ 6π and the η’π+ π− invariant mass spectrum in the decay J/ψ → γη’π+π− in the energy region near the NN¯threshold.

scholarly journals Measurement of the cross-section for electroweak production of dijets in association with a Z boson in pp collisions at s=13 TeV with the ATLAS detector

2017 ◽  
Vol 775 ◽  
pp. 206-228 ◽  
Author(s):  
M. Aaboud ◽  
G. Aad ◽  
B. Abbott ◽  
O. Abdinov ◽  
B. Abeloos ◽  
...  
Keyword(s):  
Cross Section ◽  
Z Boson ◽  
Atlas Detector ◽  
Pp Collisions ◽  
The Cross
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