Narrow Results

We concisely review semileptonic B-decays, focusing on recent progress on both theoretical and experimental sides.

This paper provides an overview of the heavy flavor physics program of the ATLAS experiment and its future potential through the discussion of recent published results.

We report on the current status of semi-leptonic B_(s) decays, including rare decays, and the extraction of the absolute values of the CKM matrix elements |V_cb| and |V_ub|.

We summarize the status of semileptonic and leptonic B decays, including $\left|V_{cb}\right|$ and $\left|V_{ub}\right|$ exclusive and inclusive determinations, decays to excited states of the charm meson spectrum and decays into $\tau$ leptons.

We present a review of heavy flavor physics results from the CDF and DØ Collaborations operating at the Fermilab Tevatron Collider. A summary of results from Run 1 is included, but we concentrate on legacy results of charm and b physics from Run 2, including results up to Summer 2014.

The associated production a vector boson with $J/\psi$ is a key observable for understanding of the quarkonium production mechanisms, including the separation of single and double parton scattering components. Measurements from the ATLAS detector at LHC on quarkonium production, including associated production of a $W^{\pm }+J/\psi$ and $Z+J/\psi$ are presented. A study of the hidden-charm states $X(3872)$ is also provided.

Heavy flavor production is a sensitive probe of the initial gluon density in the nucleon and is modified by the entire evolution of the hot quark and gluon medium created in high-energy nucleus–nucleus collisions. Besides, it is a process that can be calculated by perturbative QCD because of their large mass. The PHENIX experiment at RHIC studied the heavy flavor productions for a broad momentum and rapidity ranges using single leptons from the semileptonic decay of charm and bottom hadrons, and dileptons from $J/\psi$ decays in $p+p$, $p+$A, and Au$+$Au collisions at $\sqrt{s_{NN}}$$=$200GeV. In these proceedings, the recent experimental results in $p+p$, Au$+$Au, and the small collision systems are presented and the heavy flavor productions and their modifications are discussed.

Transverse single-spin asymmetries provide valuable information about the spin structure of the nucleon. At RHIC energies, heavy-flavor production is dominated by gluon-gluon fusion, and the subsequent decay into high $p_T$ electrons or muons can be observed statistically in a collider detector like PHENIX. The transverse single-spin asymmetry in heavy-flavor production originates from the initial state correlation between the internal transverse momentum of the parton and the transverse spin of the nucleon (similar with the known Sivers effect). The measurement of transverse single-spin asymmetry of single muons from heavy flavor decay at RHIC serves as a clean probe and would provide important information on the gluon Sivers function. In 2012, the PHENIX experiment collected 9.2 $p{b}^{-1}$ integrated luminosity in transversely polarized $p+p$ collisions at $\sqrt{s}$ = 200 GeV with a polarization of $60\%$. The signal-to-background ratio was improved by a factor of two compared to the previous RHIC 2006 and 2008 results in high transverse momentum region ($p_T>3$GeV). The recent PHENIX preliminary results of transverse single-spin asymmetries of single heavy flavor decay muon at forward-rapidity will be shown and the possible improvement on this measurement in 2015 with the help of the FVTX detector will be discussed.

A U.S.-based Electron-Ion Collider will provide the ultimate capability to determine both the structure and properties of nucleons and nuclei, as well as how matter and energy can be transported through a strongly interacting quantum mechanical environment. The production and propagation of long-lived heavy subatomic particles is a unique and critical part of this planned decade-long research program. In these proceedings we report the derivation of all branching processes in nuclei that lead to a modification of semi-inclusive hadron production, jet cross sections, and jet substructure when compared to the vacuum. This work allows for their evaluation to any desired order in opacity. As an example, we show an application to the modification of light hadron and open heavy flavor fragmentation functions at the EIC. We discuss how this observable can shed light on the physics of hadronization and parton energy loss in large nuclei.

Recent results on multi-strange and heavy flavor production at RHIC are discussed and compared with model predictions. The idea of heavy flavor collectivity and light flavor thermalization is presented in the light of recent heavy flavor measurement at RHIC.

Results on inclusive b-jet production, Z + b-jet production, and b-jet production from process at the Tevatron are presented.