MEASUREMENT OF THE $t\bar{t}$ PRODUCTION CROSS SECTION IN THE DILEPTON CHANNEL AT CDF

2005 ◽  
Vol 20 (14) ◽  
pp. 3174-3176
Author(s):  
◽  
REDA TAFIROUT
Keyword(s):  
Cross Section ◽  
Production Cross Section ◽  
Transverse Energy ◽  
Production Cross ◽  
Missing Transverse Energy ◽  
Dilepton Channel ◽  
Text Production ◽  
Dilepton Events ◽  
The Standard Model ◽  
Complementary Techniques

We report a measurement of the [Formula: see text] production cross section using dilepton events with jets and missing transverse energy in [Formula: see text] collisions at [Formula: see text]. Using 197 pb-1 of data recorded by the upgraded Collider Detector at Fermilab (CDF II), we use two complementary techniques to select candidate events. The combined result yields a [Formula: see text] production cross section of [Formula: see text] which is consistent with the Standard Model.

NEW HEAVY LEPTON PAIR-PRODUCTION FROM Z′ RESONANCES AT HADRON COLLIDERS

1988 ◽  
Vol 03 (06) ◽  
pp. 589-597
Author(s):  
J.L. HEWETT ◽  
T.G. RIZZO
Keyword(s):  
Pair Production ◽  
Cross Section ◽  
Production Cross Section ◽  
Production Cross ◽  
Lepton Pair ◽  
Hadron Colliders ◽  
Heavy Lepton ◽  
Lepton Pair Production ◽  
Text Production ◽  
The Standard Model

We examine the possibility that heavy lepton (L) pair production can be significantly enhanced by the existence of a new neutral gauge boson Z′ in hadron collisions. We find that in several E6-type models, the [Formula: see text] production cross section far exceeds that expected in the standard model. This may allow for the observation of [Formula: see text] pairs above the large W+W− background.

scholarly journals Measurement of the tt¯ production cross section and top quark mass extraction using dilepton events in pp¯ collisions

2009 ◽  
Vol 679 (3) ◽  
pp. 177-185 ◽  
Author(s):  
V.M. Abazov ◽  
B. Abbott ◽  
M. Abolins ◽  
B.S. Acharya ◽  
M. Adams ◽  
...  
Keyword(s):  
Cross Section ◽  
Top Quark ◽  
Production Cross Section ◽  
Quark Mass ◽  
Production Cross ◽  
Top Quark Mass ◽  
Dilepton Events

scholarly journals $$ t\overline{t}t\overline{t} $$ signatures through the lens of color-octet scalars

2022 ◽  
Vol 2022 (1) ◽  
Author(s):  
Linda M. Carpenter ◽  
Taylor Murphy ◽  
Matthew J. Smylie
Keyword(s):  
Cross Section ◽  
Transverse Energy ◽  
Production Cross ◽  
Top Quarks ◽  
Atlas Collaboration ◽  
Missing Transverse Energy ◽  
Color Octet ◽  
Section Measurement ◽  
Discovery Potential ◽  
New Phenomena

Abstract We reinterpret two recent LHC searches for events containing four top quarks $$ \left(t\overline{t}t\overline{t}\right) $$ t t ¯ t t ¯ in the context of supersymmetric models with Dirac gauginos and color-octet scalars (sgluons). We explore whether sgluon contributions to the four-top production cross section $$ \sigma \left( pp\to t\overline{t}t\overline{t}\right) $$ σ pp → t t ¯ t t ¯ can accommodate an excess of four-top events recently reported by the ATLAS collaboration. We also study constraints on these models from an ATLAS search for new phenomena with high jet multiplicity and significant missing transverse energy $$ \left({E}_{\mathrm{T}}^{\mathrm{miss}}\right) $$ E T miss sensitive to signals with four top quarks. We find that these two analyses provide complementary constraints, with the jets + $$ {E}_{\mathrm{T}}^{\mathrm{miss}} $$ E T miss search exceeding the four-top cross section measurement in sensitivity for sgluons heavier than about 800 GeV. We ultimately find that either a scalar or a pseudoscalar sgluon can currently fit the ATLAS excess in a range of reasonable benchmark scenarios, though a pseudoscalar in minimal Dirac gaugino models is ruled out. We finally offer sensitivity projections for these analyses at the HL-LHC, mapping the 5σ discovery potential in sgluon parameter space and computing exclusion limits at 95% CL in scenarios where no excess is found.

MEASUREMENT OF THE TOP QUARK PAIR PRODUCTION CROSS SECTION IN LEPTON+JETS FINAL STATES AT DØ USING A MULTIVARIATE TECHNIQUE

2005 ◽  
Vol 20 (14) ◽  
pp. 3177-3179
Author(s):  
◽  
TOBIAS GOLLING
Keyword(s):  
Pair Production ◽  
Cross Section ◽  
Top Quark ◽  
Production Cross Section ◽  
Production Cross ◽  
Final States ◽  
Multivariate Technique ◽  
Text Production ◽  
Lepton Jets ◽  
Pair Production Cross Section

A measurement of the [Formula: see text] production cross-section at [Formula: see text] with the DØ detector at the Fermilab Tevatron, based on the application of a multivariate topological method is presented. The integrated luminosity corresponds to 143.9 pb-1 in the μ+jets and 141.2 pb-1 in the e+jets channel. The preliminary cross-section is measured to be [Formula: see text].

A VIEW OF THE TOP.

1998 ◽  
Vol 13 (17) ◽  
pp. 2883-2930 ◽  
Author(s):  
GIORGIO CHIARELLI
Keyword(s):  
Cross Section ◽  
Top Quark ◽  
Production Cross Section ◽  
Production Cross ◽  
Top Physics ◽  
Precision Measurements ◽  
Selection Strategies ◽  
Text Production ◽  
Top Mass

In this review I summarize the results obtained by CDF on top physics. After the discovery of the top quark, the efforts were concentrated on obtaining precision measurements of the observables. A description of the algorithms developed and used to isolate top in various samples is given, together with the discussion of background and selection strategies followed. The measurements of top mass and [Formula: see text] production cross section are discussed in detail and studies related to top decays and kinematics of [Formula: see text] events are presented.

scholarly journals Measurement of theW+W−Production Cross Section inpp¯Collisions ats=1.96  TeVusing Dilepton Events

2005 ◽  
Vol 94 (21) ◽  
Author(s):  
D. Acosta ◽  
J. Adelman ◽  
T. Affolder ◽  
T. Akimoto ◽  
M. G. Albrow ◽  
...  
Keyword(s):  
Cross Section ◽  
Production Cross Section ◽  
Production Cross ◽  
Dilepton Events
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