scholarly journals Inclusive particle production in e/sup +/e/sup -/ interactions in the 6 and 7 GeV center-of-mass energy regions. [Cross sections, branching ratio]

1978 ◽  
Author(s):  
D. H. Badtke
Keyword(s):  
Cross Sections ◽  
Particle Production ◽  
Center Of Mass ◽  
Branching Ratio ◽  
Mass Energy ◽  
Center Of Mass Energy

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 HiggsBounds-5: testing Higgs sectors in the LHC 13 TeV Era

2020 ◽  
Vol 80 (12) ◽  
Author(s):  
Philip Bechtle ◽  
Daniel Dercks ◽  
Sven Heinemeyer ◽  
Tobias Klingl ◽  
Tim Stefaniak ◽  
...  
Keyword(s):  
Center Of Mass ◽  
Branching Ratio ◽  
Computer Code ◽  
Higgs Bosons ◽  
Final States ◽  
Mass Energy ◽  
The Public ◽  
Center Of Mass Energy ◽  
Higgs Search ◽  
Recent Developments

AbstractWe describe recent developments of the public computer code . In particular, these include the incorporation of LHC Higgs search results from Run 2 at a center-of-mass energy of 13 TeV, and an updated and extended framework for the theoretical input that accounts for improved Higgs cross section and branching ratio predictions and new search channels. We furthermore discuss an improved method used in to approximately reconstruct the exclusion likelihood for LHC searches for non-standard Higgs bosons decaying to $$\tau \tau $$ τ τ final states. We describe in detail the new and updated functionalities of the new version .

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.

A-DEPENDENCE OF Z-SCALING

2001 ◽  
Vol 16 (07) ◽  
pp. 1281-1301 ◽  
Author(s):  
M. V. TOKAREV ◽  
Yu. A. PANEBRATSEV ◽  
I. ZBOROVSKÝ ◽  
G. P. ŠKORO
Keyword(s):  
Cross Sections ◽  
Particle Production ◽  
Center Of Mass ◽  
Nucleon Nucleon ◽  
Hadron Production ◽  
Scale Transformation ◽  
Invariant Cross Section ◽  
Center Of Mass Energy ◽  
Energy Formula ◽  
Nucleon Nucleon Interaction

The A-dependence of z-scaling in inclusive hadron production in pA collisions at high transverse momenta is studied. The concept of z-scaling based on the fundamental principles of Nature such as self-similarity, locality, scale relativity and fractality reflecting the general features of particle interactions is applied for the description of processes of hadron production in pA collisions. The scaling function ψ is expressed via the invariant cross-section Ed3σ/dq3 and the average multiplicity density dN/dη of particles produced at pseudorapidity η=0 in the corresponding nucleon–nucleon interaction. The independence of the function ψ(z) on the center-of-mass energy [Formula: see text] for particle production near 90° in the NN c.m. system for different nuclei from D up to Pb is shown. The scale transformation z→az, ψ→a-1ψ is used to determine the A-dependence of the transformation parameter a. Based on the properties of z-scaling the dependence of the cross-sections for the π±, K±, and [Formula: see text] hadrons produced in pA collisions on transverse momentum q⊥ in the central region (η=0) at RHIC energies is predicted.

RECENT RESULTS FROM THE KLOE EXPERIMENT AT DAΦNE

2005 ◽  
Vol 20 (26) ◽  
pp. 1939-1952
Author(s):  
◽  
MATTEO PALUTAN
Keyword(s):  
Center Of Mass ◽  
Branching Ratio ◽  
Branching Ratios ◽  
Initial State Radiation ◽  
Mass Energy ◽  
Initial State ◽  
Center Of Mass Energy ◽  
Upper Limit ◽  
State Radiation ◽  
Selection Of

The KLOE experiment at DAΦNE has collected data for an integrated luminosity of ~ 1.3 fb-1 from e+e- collisions at center-of-mass energy around the ϕ-meson peak, W ~1.02 GeV . A selection of results obtained from a sample of 450 pb-1 of data acquired during year 2001 and 2002 is presented. Studying tagged KS and KL-mesons produced in the reaction e+e-→ϕ→KS KL we measured the branching ratio of the decay KS→πeν, the upper limit on the decay KS→π0π0π0, and the main KL decay branching ratios. Exploiting the initial state radiation in the reaction e+e-→π+π-γ, we extracted the hadronic cross-section as a function of the squared center-of-mass energy sπ of the π π system, in the range 0.35 < sπ < 0.95 GeV 2.

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

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).

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