scholarly journals Definition and calculation of bottom quark cross-sections in deep-inelastic scattering at HERA and determination of their uncertainties

2003 ◽  
Vol 2003 (09) ◽  
pp. 070-070 ◽  
Author(s):  
Tancredi Carli ◽  
Vincenzo Chiochia ◽  
Katarzyna Klimek
Keyword(s):  
Inelastic Scattering ◽  
Deep Inelastic Scattering ◽  
Cross Sections ◽  
Bottom Quark

scholarly journals Inclusive jet cross sections in the Breit frame in neutral current deep inelastic scattering at HERA and determination of αs

2002 ◽  
Vol 547 (3-4) ◽  
pp. 164-180 ◽  
Author(s):  
S. Chekanov ◽  
D. Krakauer ◽  
S. Magill ◽  
B. Musgrave ◽  
J. Repond ◽  
...  
Keyword(s):  
Inelastic Scattering ◽  
Deep Inelastic Scattering ◽  
Cross Sections ◽  
Neutral Current ◽  
Inclusive Jet ◽  
Jet Cross Sections

scholarly journals MULTIJET PRODUCTION IN NEUTRAL CURRENT DEEP INELASTIC SCATTERING AT HERA AND DETERMINATION OF αs

2005 ◽  
Vol 20 (08n09) ◽  
pp. 2002-2005
Author(s):  
LIANG LI
Keyword(s):  
Inelastic Scattering ◽  
Deep Inelastic Scattering ◽  
Cross Sections ◽  
Transverse Energy ◽  
Neutral Current ◽  
Coupling Constant ◽  
Centre Of Mass ◽  
Multijet Production ◽  
Energy Formula

Multijet production rates in neutral current deep inelastic scattering (DIS) have been measured in the range of exchanged boson virtualities 10<Q2<5000 GeV2. The data were taken at the ep collider HERA with centre-of-mass energy [Formula: see text] using the ZEUS detector and correspond to an integrated luminosity of 82.2 pb-1. Jets were identified in the Breit frame using the kTcluster algorithm in the longitudinally invariant inclusive mode. Measurements of differential multijet cross sections are presented as functions of jet transverse energy [Formula: see text], pseudorapidity [Formula: see text] and Q2with [Formula: see text] and [Formula: see text]. Next-to-leading-order QCD calculations describe the data well. The value of the strong coupling constant αs(MZ), determined from the ratio of the trijet to dijet cross sections, is [Formula: see text].

Analysis of STEM micrographs of thick objects

1978 ◽  
Vol 36 (2) ◽  
pp. 106-107
Author(s):  
S. Golladay
Keyword(s):  
Inelastic Scattering ◽  
Multiple Scattering ◽  
Mass Distribution ◽  
Cross Sections ◽  
Phase Contrast ◽  
Image Point ◽  
Contrast Effects ◽  
Total Cross Sections ◽  
Elastic And Inelastic Scattering

The theory of multiple scattering has been worked out by Groves and comparisons have been made between predicted and observed signals for thick specimens observed in a STEM under conditions where phase contrast effects are unimportant. Independent measurements of the collection efficiencies of the two STEM detectors, calculations of the ratio σe/σi = R, where σe, σi are the total cross sections for elastic and inelastic scattering respectively, and a model of the unknown mass distribution are needed for these comparisons. In this paper an extension of this work will be described which allows the determination of the required efficiencies, R, and the unknown mass distribution from the data without additional measurements or models. Essential to the analysis is the fact that in a STEM two or more signal measurements can be made simultaneously at each image point.

scholarly journals The challenge of the EMC effect: Existing data and future directions

2014 ◽  
Vol 23 (08) ◽  
pp. 1430013 ◽  
Author(s):  
Simona Malace ◽  
David Gaskell ◽  
Douglas W. Higinbotham ◽  
Ian C. Cloët
Keyword(s):  
Inelastic Scattering ◽  
Deep Inelastic Scattering ◽  
Cross Sections ◽  
Charged Lepton ◽  
Current Status ◽  
Theoretical Understanding ◽  
Future Directions ◽  
Precise Data ◽  
Emc Effect ◽  
Existing Data

Since the discovery that the ratio of inclusive charged lepton (per-nucleon) cross-sections from a nucleus A to the deuteron is not unity — even in deep inelastic scattering kinematics — a great deal of experimental and theoretical effort has gone into understanding the phenomenon. The EMC effect, as it is now known, shows that even in the most extreme kinematic conditions the effects of the nucleon being bound in a nucleus cannot be ignored. In this paper, we collect the most precise data available for various nuclear to deuteron ratios, as well as provide a commentary on the current status of the theoretical understanding of this thirty year old effect.

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