scholarly journals Towards model-independent approach to the analysis of interference effects in pair production of new heavy quarks

2014 ◽  
Vol 2014 (7) ◽  
Author(s):  
D. Barducci ◽  
A. Belyaev ◽  
J. Blamey ◽  
S. Moretti ◽  
L. Panizzi ◽  
...  
Keyword(s):  
Pair Production ◽  
Heavy Quarks ◽  
Interference Effects ◽  
Model Independent

scholarly journals ON THE MOTION OF HEAVY QUARKS INSIDE HADRONS: UNIVERSAL DISTRIBUTIONS AND INCLUSIVE DECAYS

1994 ◽  
Vol 09 (14) ◽  
pp. 2467-2504 ◽  
Author(s):  
I.I. BIGI ◽  
M.A. SHIFMAN ◽  
N.G. URALTSEV ◽  
A.L. VAINSHTEIN
Keyword(s):  
Lower Bound ◽  
Kinetic Energy ◽  
Heavy Quark ◽  
Heavy Quarks ◽  
Nucleon Scattering ◽  
Fermi Motion ◽  
Inclusive Decays ◽  
Model Independent ◽  
Similarities And Differences

In previous papers we have pointed out that there exists a QCD analog of the phenomenological concept of the so-called Fermi motion for the heavy quark inside a hadron. Here we show in a more detailed way how this comes about and we analyze the limitations of this concept. Nonperturbative as well as perturbative aspects are included. We emphasize both similarities and differences to the well-known treatment of deep inelastic lepton-nucleon scattering. We derive a model-independent lower bound on the kinetic energy of the heavy quark inside the hadron.

scholarly journals Spin-1 resonances

2021 ◽  
Author(s):  
Stefania De Curtis ◽  
Daniele Dominici
Keyword(s):  
Finite Width ◽  
Interference Effects ◽  
Composite Higgs ◽  
Model Independent

AbstractSpin-1 resonances are naturally present in composite Higgs frameworks. We first review a model independent approach to parameterize a single additional heavy triplet and then we consider more realistic models arising in composite Higgs scenarios where a larger number of spin-1 resonances is expected. In these cases, finite width and interference effects can heavily affect the bounds extracted from the data.

Interference effects in the Schwinger pair-production mechanism

1991 ◽  
Vol 43 (1) ◽  
pp. 250-257 ◽  
Author(s):  
A. B. Balantekin ◽  
S. H. Fricke
Keyword(s):  
Pair Production ◽  
Production Mechanism ◽  
Interference Effects

scholarly journals SUPERSYMMETRY AT LINEAR COLLIDERS: THE IMPORTANCE OF BEING e-e-

1998 ◽  
Vol 13 (14) ◽  
pp. 2319-2328 ◽  
Author(s):  
JONATHAN L. FENG
Keyword(s):  
Pair Production ◽  
Mass Measurements ◽  
Fermion Number ◽  
Linear Colliders ◽  
Order Of Magnitude ◽  
Model Independent ◽  
Better Than ◽  
Slepton Mass ◽  
Integrated Luminosity

Advantages of the e-e- option at linear colliders for the study of supersymmetry are highlighted. The fermion number violating process [Formula: see text] provides unique opportunities for studies of slepton masses and flavor mixings. In particular, slepton mass measurements at the 100 MeV level through threshold scans of scalar pair production may be possible. Such measurements are over an order of magnitude better than those possible in e+e- mode, require far less integrated luminosity, and may lead to precise, model-independent measurements of tan β. Implications for studying gauginos and the importance of accurate beam polarimetry are also discussed.

scholarly journals LEPTOQUARK PAIR PRODUCTION AT ep COLLIDERS

1994 ◽  
Vol 09 (32) ◽  
pp. 3007-3021 ◽  
Author(s):  
JOHANNES BLÜMLEIN ◽  
EDWARD BOOS ◽  
ALEXANDER PUKHOV
Keyword(s):  
Pair Production ◽  
Cross Section ◽  
Production Cross Section ◽  
Production Cross ◽  
Gluon Fusion ◽  
Low Energy ◽  
Numerical Predictions ◽  
Independent Analysis ◽  
Pair Production Cross Section ◽  
Model Independent

The pair production cross-section for scalar and vector leptoquarks at ep colliders is calculated for the case of photon-gluon fusion. In a model independent analysis we consider the most general C and P conserving couplings of gluons and photons to both scalar and vector leptoquarks described by an effective low-energy Lagrangian which obeys U (1) em × SU (3)c invariance. Numerical predictions are given for the kinematical regime at HERA and LEP ⊗ LHC .

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