Heavy baryons as polarimeters at colliders

@article{Galanti2015HeavyBA,
  title={Heavy baryons as polarimeters at colliders},
  author={Mario Galanti and Andrea Giammanco and Yuval Grossman and Yevgeny Kats and Emmanuel Stamou and Jure Zupan},
  journal={Journal of High Energy Physics},
  year={2015},
  volume={2015},
  pages={1-49}
}
A bstractIn new-physics processes that produce b or c jets, a measurement of the initial b or c-quark polarization could provide crucial information about the structure of the new physics. In the heavy-quark limit, the b and c-quark polarizations are preserved in the lightest baryons they hadronize into, Λb and Λc, respectively. We revisit the prediction for the polarization retention after the hadronization process and extend it to the case of transverse polarization. We show how ATLAS and CMS… 

Measuring quark polarizations at ATLAS and CMS

Being able to measure the polarization of quarks produced in various processes at the LHC would be of fundamental significance. Measuring the polarizations of quarks produced in new physics

Measuring c-quark polarization in W +c samples at ATLAS and CMS

A bstractThe process pp → W−c produces polarized charm quarks. The polarization is expected to be partly retained in Λc baryons when those form in the c-quark hadronization. We argue that it will

Angular distribution of polarised Λb baryons decaying to Λℓ+ℓ−

A bstractRare b → sℓ+ℓ− flavour-changing-neutral-current processes provide important tests of the Standard Model of particle physics. Angular observables in exclusive b → sℓ+ℓ− processes can be

Measuring polarization of light quarks at ATLAS and CMS

Polarization of strange quarks is preserved to a high degree when they hadronize into Lambda baryons, as observed in Z decays at LEP. This opens up the possibility for ATLAS and CMS to use

Measuring polarizations of bottom, charm, strange, up and down quarks in top decays

Standard Model $t\bar t$ samples in ATLAS and CMS provide an opportunity to conduct measurements of the polarization of quarks produced in top-quark decays. The bottom quarks from the $t \to W^+ b$

Search for New Physics via Baryon EDM at LHC

Permanent electric dipole moments (EDMs) of fundamental particles provide powerful probes for physics beyond the Standard Model. We propose to search for the EDM of strange and charm baryons at LHC,

Radiative b-baryon decays to measure the photon and b-baryon polarization

The radiative decays of $b$-baryons facilitate the direct measurement of photon helicity in $b\to s\gamma$ transitions thus serving as an important test of physics beyond the Standard Model. In this

Measuring the CP property of Higgs coupling to tau leptons in the VBF channel at the LHC

A bstractWe study the prospects of measuring the CP property of the Higgs (h) coupling to tau leptons using the vector boson fusion (VBF) production mode at the high-luminosity LHC. Utilizing the

Investigating the color-suppressed decays $\Lambda_b\rightarrow \Lambda \psi$ in the perturbative QCD approach

The nonleptonic two-body Λb → Λψ decays with ψ = J/ψ or ψ(2S) are investigated based on the perturbative QCD approach. These are color-suppressed processes in which the nonfactorizable contributions

Probing the standard model with rare charm decays

This thesis comprises a study of rare charm decays in the standard model (SM) and beyond. Within an effective theory framework, we calculate the SM Wilson coefficients to (partly) next-to-next-to

References

SHOWING 1-10 OF 178 REFERENCES

Identification of b-quark jets with the CMS experiment

At the Large Hadron Collider, the identification of jets originating from b quarks is important for searches for new physics and for measurements of standard model processes. A variety of algorithms

Identification of b-quark jets with the CMS experiment

At the Large Hadron Collider, the identification of jets originating from b quarks is important for searches for new physics and for measurements of standard model processes. A variety of algorithms

Measurement of the b polarization with pp collisions at 7 TeV

This thesis presents a measurement of the Λb baryon polarization with proton-proton collisions at a center-of-mass energy √ s = 7 TeV. The analysis is performed with the CMS detector at the Large

Measurement of the b Quark Fragmentation Function in Z0 Decays

We present a new preliminary measurement of the b quark fragmentation function in Z0 decays using a novel kinematic B hadron energy reconstruction technique. The measurement is performed using

Transversely polarized parton densities, their evolution and their measurement

AbstractThe transverse spin asymmetry of a quark in a baryon and the linear polarization of a gluon in a vector meson are studied from thet-channel point of view. Using the Altarelli-Parisi approach,

Hadronic Weak Decays of Λb Baryon in the Covariant Oscillator Quark Model

Cabibbo allowed two-body hadronic weak decays of Λb baryons are analyzed in the factorization approximation. We use the covariant oscillator quark model to evaluate the heavy → heavy and heavy →

Top B physics at the LHC.

The proposed strategy to measure CP violation is independent of those adopted so far in experiments, and can already constrain non standard model sources of CP violation with current and near future LHC data.
...