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Top Quark Physics

M. Beneke, I. Efthymiopoulos, M. L. Mangano, J. Womersley, A. Ahmadov, G. Azuelos, U. Baur, A. Belyaev, E. L. Berger, W. Bernreuther, E. E. Boos, M. Bosman, A. Brandenburg, R. Brock, M. Buice, N. Cartiglia, F. Cerutti, A. Cheplakov, L. Chikovani, M. Cobal-Grassmann, G. Corcella, F. del Aguila, T. Djobava, J. Dodd, V. Drollinger, A. Dubak, S. Frixione, D. Froidevaux, B. Gonzalez Pineiro, Y. P. Gouz, D. Green, P. Grenier, S. Heinemeyer, W. Hollik, V. Ilyin, C. Kao, A. Kharchilava, R. Kinnunen, V. V. Kukhtin, S. Kunori, L. La Rotonda, A. Lagatta, M. Lefebvre, K. Maeshima, G. Mahlon, S. Mc Grath, G. Medin, R. Mehdiyev, B. Mele, Z. Metreveli, D. O'Neil, L. H. Orr, D. Pallin, S. Parke, J. Parsons, D. Popovic, L. Reina, E. Richter-Was, T. G. Rizzo, D. Salihagic, M. Sapinski, M. H. Seymour, V. Simak, L. Simic, G. Skoro, S. R. Slabospitsky, J. Smolik, L. Sonnenschein, T. Stelzer, N. Stepanov, Z. Sullivan, T. Tait, I. Vichou, R. Vidal, D. Wackeroth, G. Weiglein, S. Willenbrock, W. Wu

TL;DR

This work surveys the top quark physics program at the LHC, detailing how precise top quark mass determinations, electroweak precision constraints, and QCD predictions for ttbar production complement searches for new physics. It emphasizes the importance of careful mass scheme definitions and higher-order corrections, and outlines the impact of improved m_t precision on M_W, sin^2 theta_eff, and MSSM parameter constraints. The paper articulates how large LHC top samples enable stringent SM tests, refined extractions of m_t and V_tb, and sensitivity to FCNCs, CP-violating couplings, and the top Yukawa channel. Overall, it positions top quark studies as a cornerstone of precision SM tests and a gateway to potential new physics at the TeV scale.

Abstract

We review the prospects for studies of the top quark at the LHC.

Top Quark Physics

TL;DR

This work surveys the top quark physics program at the LHC, detailing how precise top quark mass determinations, electroweak precision constraints, and QCD predictions for ttbar production complement searches for new physics. It emphasizes the importance of careful mass scheme definitions and higher-order corrections, and outlines the impact of improved m_t precision on M_W, sin^2 theta_eff, and MSSM parameter constraints. The paper articulates how large LHC top samples enable stringent SM tests, refined extractions of m_t and V_tb, and sensitivity to FCNCs, CP-violating couplings, and the top Yukawa channel. Overall, it positions top quark studies as a cornerstone of precision SM tests and a gateway to potential new physics at the TeV scale.

Abstract

We review the prospects for studies of the top quark at the LHC.

Paper Structure

This paper contains 7 sections, 9 equations, 2 figures, 2 tables.

Table of Contents

  1. INTRODUCTION
  2. TOP QUARK PROPERTIES AND ELECTROWEAK PRECISION MEASUREMENTS
  3. Top quark mass and width
  4. Role of ${\bf m_t}$ in EW precision physics
  5. Physics gain from improving $\bf \Delta m_t$ from $\bf \Delta m_t = 2$ GeV to $\bf\Delta m_t = 1$ GeV
  6. $\bf t\bar{t}$ PRODUCTION AT THE LHC
  7. Tools for QCD calculations

Figures (2)

  • Figure 1: The SM prediction in the $M_W$--$\sin^2 \theta^{\mathrm{lept}}_{\mathrm{eff}}$ plane is compared with the expected experimental accuracy at LEP2/Tevatron ($\Delta M_W = 30$ MeV, $\sin^2 \theta^{\mathrm{lept}}_{\mathrm{eff}} = 1.7 \times 10^{-4}$) and at the LHC ($\Delta M_W = 15$ MeV, $\sin^2 \theta^{\mathrm{lept}}_{\mathrm{eff}} = 1.7 \times 10^{-4}$). The theoretical uncertainties induced by $\delta (\Delta \alpha_{\mathrm{had}}) = 0.00016$ and $\Delta m_t = 2$ GeV (full line) as well as $\Delta m_t = 1$ GeV (dashed line) are shown for two values of the Higgs boson mass $m_H$.
  • Figure 2: Indirect constraints on the parameters of the scalar top sector of the MSSM from the measurement of $m_h$ at the LHC. The effect of the experimental error in $m_t$ is shown for $\Delta m_t = 2$ GeV and $\Delta m_t = 1$ GeV.