119681467
Exploring the performance limits of the ALICE Time Projection Chamber and Transition Radiation Detector for measuring identified hadron production at the LHC
The Time Projection Chamber (TPC) and Transition Radiation Detector (TRD) are the 
main tracking and particle identification devices in the ALICE experiment at the CERN 
LHC. This thesis studies aspects of their performance beyond the original designs. This 
includes extending the TPC momentum measurement for cosmic rays to sub-TeV scale, 
investigating a robust identification method for electrons and hadrons by the TRD, and 
developing new approaches to characterize the TPC and TRD signals. These studies lead 
to an intriguing observation of the transition radiation from sub-TeV cosmic muons, and 
a universal method -- the TPC coherent fit -- to extract yields of different particle species 
with momentum from 0.5 to above 20 GeV/c. 
 
With the TPC coherent fit, transverse momentum spectra (0.6 < pt < 20 GeV/c) of pions, 
kaons and protons at mid-rapidity (|y|<~0.8) in pp collisions at sqrt(s) = 2.76 and 7 TeV and 
Pb-Pb collisions at sqrt(s_NN) = 2.76 TeV at the LHC are measured. In this unified approach 
both the anomalous enhancement of the proton-to-pion ratio at moderate pt (2-8 GeV/c) 
(the so-called baryon anomaly) and the nuclear modification of particle yields up to 
high pt (> 10 GeV/c) in Pb-Pb collisions are observed. The particle production is also 
studied in jets from pp collisions at 7 TeV and the results are well described by Perugia-0 
tune of PYTHIA6.
119116044
Energy loss signals in the ALICETRD
Abstract We present the energy loss measurements with the ALICE TRD in the β γ range 1–10 4 , where β = v / c and γ = 1 / 1 − β 2 . The measurements are conducted in three different scenarios: (1)with pions and electrons from testbeams; (2)with protons, pions and electrons in proton–proton collisions at center-of-mass energy 7 TeV; (3)with muons detected in ALICE cosmic runs. In the testbeam and cosmic ray measurements, ionization energy loss (d E /d x ) signal as well as ionization energy loss plus transition radiation (d E /d x +TR) signal are measured. With cosmic muons the onset of TR is observed. Signals from TeV cosmic muons are consistent with those from GeV electrons in the other measurements. Numerical descriptions of the signal spectra and the β γ - dependence of the most probable signals are also presented.
119430157
Sum rules on quantum hadrodynamics
The development on relativistic nuclear many-body theories is reviewed. The second order self-energies of hadrons are calculated from $\hat{S}_2$ matrix, and then an effective method to solve nuclear many-body problems, sum rules on quantum hadrodynamics, is summarized. The differences between this method and quantum hadrodynamics are discussed. The effective nucleon mass in the nuclear matter is redefined in the relativistic Hartree approximation, and a self-consistent relativistic mean-field model based on quantum hadrodynamics 2 is proposed. It is pointed out that the original definition on effective nucleon mass in quantum hadrodynamics 2 is not self-consistent, and all the parameters in the relativistic mean-field approximation should be fixed again according to the new definition.
118994414
Perturbative calculation of the excluded volume effect for nuclear matter in a relativistic mean-field approximation
Considering the finite volume of nucleons, a Lagrangian density is given. The first-order self-energy of the nucleon and the equation of state of nuclear matter are calculated in the framework of the relativistic mean-field approximation. Our results indicate that the effects of the volume of nucleons are not negligible.
117796054
Comment on Ji-Sheng Chen et al
This paper was withdrawn by arXiv admins because of inappropriate and unverifiable claims of appropriation.
118605527
How to use the Standard Model effective field theory
A bstractWe present a practical three-step procedure of using the Standard Model effective field theory (SM EFT) to connect ultraviolet (UV) models of new physics with weak scale precision observables. With this procedure, one can interpret precision measurements as constraints on a given UV model. We give a detailed explanation for calculating the effective action up to one-loop order in a manifestly gauge covariant fashion. This covariant derivative expansion method dramatically simplifies the process of matching a UV model with the SM EFT, and also makes available a universal formalism that is easy to use for a variety of UV models. A few general aspects of RG running effects and choosing operator bases are discussed. Finally, we provide mapping results between the bosonic sector of the SM EFT and a complete set of precision electroweak and Higgs observables to which present and near future experiments are sensitive. Many results and tools which should prove useful to those wishing to use the SM EFT are detailed in several appendices.
116450098
What do precision Higgs measurements buy us
We study the sensitivities of future precision Higgs measurements and electroweak observables in probing physics beyond the Standard Model. Using effective field theory--appropriate since precision measurements are indirect probes of new physics--we examine two well-motivated test cases. One is a tree-level example due to a singlet scalar field that enables the first-order electroweak phase transition for baryogenesis. The other is a one-loop example due to scalar top in the MSSM. We find both Higgs and electroweak measurements are sensitive probes of these cases.