b-quark
Search for Supersymmetry in Four W and Multiple b-Quark Final States
... The CMS collaboration [1] explored various final states to search for signatures with four W and multi- ple b-quarks using the LHC data collected in 2012 [2– 5]. The SM backgrounds and the search strategies vary ...
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The b quark mass from non perturbative Nf = 2 Heavy Quark Effective Theory at O(1/mh )
... With a less detailed look, the overall picture of the MS masses in table 4 suggests that – at the present level of errors – the b-quark mass is correctly determined from the different approaches. Our method ...
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Searches for New Physics in Events with a Photon and b-quark Jet at CDF
... The first method for deriving A ⑀ to use in conjunction with the model-independent limits is object efficiencies. The person investigating a model would run a Monte Carlo gen- erator and place the acceptance cuts on the ...
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Effective Hamiltonian of Electroweak Penguin for Hadronic b Quark Decays
... In the Standard Model, flavor-changing neutral currents are forbidden, for example, there is no direct coupling between the b quark and the s or d quarks. Effective flavor-changing neutral currents are ...
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Search for single b∗ quark production with the ATLAS detector at √s=7 TeV
... m b ∗ = 800 GeV in which both W bosons decay leptonically (to either e or μ ) is ...from b quarks is not ...the b ∗ -quark signal, and accounts for 13% of the total ...
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Study of b quark mass effects in multijet topologies with the DELPHI detector at LEP
... the b-quark mass at high ...into b-quarks is expected to be proportional to the mass squared, measurements of this decay channel would be very sensitive to the exact value of the mass at that ...
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b-quark and quarkonium production and polarisation
... verse momentum [37]. In particular, it was found that spin alignment for Υ (1S ) is not strong, if present at all. There are possible hints of a slightly increasing transverse po- larisation when moving from Υ (1S ) to Υ ...
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Intrinsic top quark properties: mass, charge and polarisation measured with the ATLAS detector at the LHC
... top quark in t¯ t de- cays with the ATLAS detector [1] are ...top quark of the t¯ t pair decays into a W boson and a b-quark in almost 100% of the ...a quark-antiquark ...
5
More on heavy tetraquarks in lattice QCD at almost physical pion mass
... the b-quark mass being large enough for heavy quark symmetry to be e ff ective, which entails that its spin decouples and a heavy antidiquark in a color 3 configuration behaves similarly to a single ...
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Charming loops in exclusive rare FCNC B-decays
... the B-decay form factor in QCD: the leading QCD contribution given in terms of the B-meson quark-antiquark vertex ...the b-quark line and the s-quark line originating from the ...
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Prospects for physics at high luminosity with CMS
... The studies included the associated production ZH with the Z decaying to muons and the Higgs boson decaying to b-quark pair, which will benefit significantly from the [r] ...
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Prompt atmospheric neutrino flux from the various QCD models
... Abstract. We evaluate the prompt atmospheric neutrino flux using the different QCD models for heavy quark production including the b quark contribution. We include the nuclear correction and find it ...
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πJ/ψ − DD̅* potential described by the quark exchange diagram
... the quark exchange model and the meson exchange model are displayed in ...light quark dynamics, because the spin-spin term in the charm quark interaction is suppressed due to the large mass of the ...
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Charmonium spectroscopy on dynamical anisotropic lattices
... excitation in the form of a chromomagnetic and “staple” field. The operators used in this study are summarized in Table 1. Many of the operators used here resemble the ones used in Ref. [12]. In addition to these basic ...
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Progress Towards finding Quark Masses and the QCD scale Lambda from the Lattice
... sea quark masses equal) than if we follow one of the dashed lines (sea quark mass held fixed, valence quark mass ...additive quark mass renormalisation is ...
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Meson Spectroscopy in the Light Quark Sector
... a quark and an anti-quark, are the simplest quark bound system and therefore the ideal bench- mark to study the interaction between quarks and understand what the role of gluons ...
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Search for new phenomena in events with same-charge leptons and b-jets in pp collisions at >=13 TeV with the ATLAS detector
... a b -hadron are ...top- quark pair production ( tt ). Four-top-quark production in the context of the Standard Model (SM) is also studied, since this process has not yet been ...
57
Recent Results from the CMS Experiment at the LHC
... Figure 6: (a) Best-fit values of the ratios of the VZ production cross sections, relative to SM pre- dictions for individual channels, and for all channels combined (hatched band). (b) Contours of 68% and 95% ...
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Hadronic Dark Matter
... Abstract. The possibility of hadronic Dark Matter particles is analised in the framework of the simplest extensions of the Standard Model. Hadronic particles possess strong interaction and consist of new heavy ...
6
Heavy exotic quarkonia and doubly heavy baryons
... with Γ = 46 ± 10 ± 20 MeV reported by BESIII [5]. The relatively slow decay of these exotic resonances implies that the dominant configuration of the ¯ QQ¯ qq four- body system is not that of a low-lying ¯ QQ quarkonium ...
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