scholarly journals Mass dependent top forward–backward asymmetry in the effective Lagrangian approach: Addendum to “Model independent analysis of the forward–backward asymmetry of top quark production at the Tevatron”

2012 ◽  
Vol 708 (1-2) ◽  
pp. 157-161 ◽  
Author(s):  
Dong-Won Jung ◽  
P. Ko ◽  
Jae Sik Lee
Keyword(s):  
Top Quark ◽  
Lagrangian Approach ◽  
Effective Lagrangian ◽  
Independent Analysis ◽  
Top Quark Production ◽  
Quark Production ◽  
Model Independent ◽  
Mass Dependent

scholarly journals IMPLICATIONS OF $D^0$--$\overline{D^0}$ ON THE RARE TOP QUARK DECAYS t → uγ AND t → ug

2009 ◽  
Vol 24 (39) ◽  
pp. 3219-3226 ◽  
Author(s):  
J. I. ARANDA ◽  
A. CORDERO-CID ◽  
F. RAMÍREZ-ZAVALETA ◽  
J. J. TOSCANO ◽  
E. S. TUTUTI
Keyword(s):  
Top Quark ◽  
Mass Difference ◽  
Branching Ratios ◽  
Lagrangian Approach ◽  
Effective Lagrangian ◽  
Quark Decays ◽  
Model Independent

The recently observed mass difference of the [Formula: see text] mixing is used to predict the branching ratios of the rare top quark decays t → uγ and t → ug in a model-independent way using the effective Lagrangian approach. It is found that Br (t → uγ) < 4 × 10-4 and Br (t → ug) < 2 × 10-3, which may still be within reach of the LHC collider.

scholarly journals Effective Lagrangian description of top quark production and decay

1996 ◽  
Vol 54 (11) ◽  
pp. 6861-6882 ◽  
Author(s):  
G. J. Gounaris ◽  
M. Kuroda ◽  
F. M. Renard
Keyword(s):  
Top Quark ◽  
Lagrangian Description ◽  
Effective Lagrangian ◽  
Top Quark Production ◽  
Quark Production

scholarly journals Model-independent measurement of t-channel single top quark production in pp¯ collisions at s=1.96 TeV

2011 ◽  
Vol 705 (4) ◽  
pp. 313-319 ◽  
Author(s):  
V.M. Abazov ◽  
B. Abbott ◽  
B.S. Acharya ◽  
M. Adams ◽  
T. Adams ◽  
...  
Keyword(s):  
Top Quark ◽  
Independent Measurement ◽  
Single Top ◽  
Top Quark Production ◽  
Quark Production ◽  
Model Independent

scholarly journals The top quark width constrains from the single top quark production channel.

2019 ◽  
Vol 222 ◽  
pp. 03022
Author(s):  
Alexey Baskakov ◽  
Eduard Boos ◽  
Lev Dudko
Keyword(s):  
Top Quark ◽  
Gauge Invariant ◽  
Invariant Method ◽  
Single Top ◽  
Width Measurement ◽  
Top Quark Production ◽  
Quark Production ◽  
Model Independent ◽  
Production Channel

Using model independent and gauge invariant method proposed in previous studies we provide estimations on the top quark width measurement from the single top quark production channel and discuss the results of combining measurements from single and pair top quark production.

scholarly journals Combined SMEFT interpretation of Higgs, diboson, and top quark data from the LHC

2021 ◽  
Vol 2021 (11) ◽  
Author(s):  
◽  
Jacob J. Ethier ◽  
Giacomo Magni ◽  
Fabio Maltoni ◽  
Luca Mantani ◽  
...  
Keyword(s):  
Parameter Space ◽  
Cross Sections ◽  
Top Quark ◽  
Theoretical Calculations ◽  
Global Analysis ◽  
Effective Field ◽  
Top Quark Production ◽  
Quark Production ◽  
Model Independent ◽  
The Impact

Abstract We present a global interpretation of Higgs, diboson, and top quark production and decay measurements from the LHC in the framework of the Standard Model Effective Field Theory (SMEFT) at dimension six. We constrain simultaneously 36 independent directions in its parameter space, and compare the outcome of the global analysis with that from individual and two-parameter fits. Our results are obtained by means of state-of-the-art theoretical calculations for the SM and the EFT cross-sections, and account for both linear and quadratic corrections in the 1/Λ2 expansion. We demonstrate how the inclusion of NLO QCD and $$ \mathcal{O} $$ O (Λ−4) effects is instrumental to accurately map the posterior distributions associated to the fitted Wilson coefficients. We assess the interplay and complementarity between the top quark, Higgs, and diboson measurements, deploy a variety of statistical estimators to quantify the impact of each dataset in the parameter space, and carry out fits in BSM-inspired scenarios such as the top-philic model. Our results represent a stepping stone in the ongoing program of model-independent searches at the LHC from precision measurements, and pave the way towards yet more global SMEFT interpretations extended to other high-pT processes as well as to low-energy observables.

Sign in / Sign up

Export Citation Format

Share Document