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60 645 (0,339s) •

Result

Determination of the strange-quark density of the proton from ATLAS measurements of the W -> lv and Z -> ll cross sections

HERA. The ATLAS data exhibit sensitivity to the light quark sea composition of a symmetric composition of the light quark sea at low x. The ratio of the strange-to-down sea quark distributions is determin...

BF - Elementární částice a fyzika vysokých energií

  • 2012
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Result

Measurement of Dijet Angular Distributions at s=1.96 TeV and Searches for Quark Compositeness and Extra Spatial Dimensions

to constrain new physics models including quark compositeness, large extra dimensions...

BF - Elementární částice a fyzika vysokých energií

  • 2009
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Result

Measurement of Dijet Angular Distributions and Search for Quark Compositeness in pp Collisions at root s=7 TeV

, and yield no evidence of quark compositeness. With a modified frequentist approach, a lower limit on the contact interaction scale for left-handed quarks of Lambda......

BF - Elementární částice a fyzika vysokých energií

  • 2011
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Result

Role of gluons and the quark sea in the proton spin

a composite object. In this letter we discuss the question of spin content of the virtual cloud in two different cases: electron and quark. Further, the quark spin is discussed in the context of proton spin, which is gener...

BF - Elementární částice a fyzika vysokých energií

  • 2015
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Result

Search for quark contact interactions in dijet angular distributions in pp collisions at root s=7 TeV measured with the ATLAS detector

. Analysis of the chi distributions excludes quark contact interactions with a compositeness scale Lambdabelow 3.4 TeV, at 95% confidence level, significantly exceeding......

BF - Elementární částice a fyzika vysokých energií

  • 2011
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Result

Measurement of Dijet Angular Distributions at s=1.96 TeV and Searches for Quark Compositeness and Extra Spatial Dimensions (Art. No. 191803)

of perturbative QCD and are used to constrain new physics models including quark compositeness...

BF - Elementární částice a fyzika vysokých energií

  • 2009
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Result

Top quark and neutrino composite Higgs bosons

In the context of top-quark condensation models, the top quark alone is too. We address the question of a phenomenological feasibility of the top-quark to reproduce the masses of electroweak gauge bosons, the top-quark<...

BF - Elementární částice a fyzika vysokých energií

  • 2013
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Result

Search for quark compositeness in dijet angular distributions from pp collisions at root s=7 TeV

A search for quark compositeness using dijet angular distributions from pp collisions at root s = 7TeV is presented. The search has been carried out using a data sample corresponding to an integrated luminosity of 2 : 2 fb(-1), reco...

BF - Elementární částice a fyzika vysokých energií

  • 2012
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Result

Search for anomalous production of highly boosted Z bosons decaying to mu(+)mu(-) in proton-proton collisions at root s=7 TeV

are obtained on models predicting the production of excited quarks decaying via electroweak processes. Assuming a compositeness scale that is equal to the excited quark mass as well as transition coupling strengths between...

BF - Elementární částice a fyzika vysokých energií

  • 2013
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Result

Proton spin in leading order of the covariant approach

We study the covariant version of the quark-parton model, in which the general rules of the angular momentum composition are accurately taken into account. We demonstrate how these rules affect the relativistic interplay between the...

BF - Elementární částice a fyzika vysokých energií

  • 2014
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