Dissertation > Excellent graduate degree dissertation topics show

pQCD program double Higgs model with B_s → PP decay process

Author: ShiZuo
Tutor: XiaoZhenJun
School: Nanjing Normal University
Course: Particle Physics and Nuclear Physics
Keywords: Standard model Two - Higgs model the pQCD factors program The B_s meson non - leptonic charm decay
CLC: O572.33
Type: Master's thesis
Year: 2011
Downloads: 3
Quote: 0
Read: Download Dissertation

Abstract


As we all know, the B meson, both theoretical research and experimental measurements to test the standard model and search for new physics signal of great significance. At present, it has been the standard model under the B meson decay doing extensive research, this paper we study a class of decay of Bs meson decay into two pseudoscalar mesons (Bs → P2P3). We calculate the decay branching ratio of 13 specific decay and CP violation in the standard model predicted that their new physical correction in the two-Higgs model in the overview section of the thesis, we first discuss the limitations of the standard model, introduced Create a new physical model of motivation. In the second chapter, a brief presentation and discussion of the standard model and the two-Higgs model. In the third chapter, a brief introduction to the basic theoretical framework of B physics research and hadronic matrix element calculation of B meson decay process factorization method introduced last highlight pQCD factor the use of the two-body decay of the program in the Bs meson. The fourth chapter is the working part of the thesis. We first calculate the Wilson coefficients in the two-Higgs model III, the results show that the two-Higgs model III for the correction of the Wilson coefficients Ci (i = 3 ~ 10) is very small and can be ignored. The main amendments from the color magnetic dipole contribution C8g. In the fourth chapter, we use pQCD factorization scheme, calculated 13 new physical decay branching ratio of Bs → P2P3 decays and CP violation correction, and analyzed. Bs decay only a few experimental measurements of decay channels. For the branching ratio of the decay channels, just select the appropriate parameters in the two-Higgs model, the theoretical predictions and experimental measurements can be a good match. Analysis, we found: (a) the four decay channel color magnetic penguin contribution model III correction is very small. (B) For those color magnetic penguin contribution based decay channel decay branching ratio, model Ⅲ can be given to the enhancement of 30% to 190%. Chapter IV, we are still under the theoretical framework of the standard model and the two-Higgs model III calculated 13 decay channels of direct CP destruction, and found that: (a) four color magnetic penguin contribution decay channel, dual Higgs Model III contribution remains small. (B) in the nine other decay channels, in addition to the B8 → K π-, new physics corrections are so direct CP violation mold reduce decay channels Bs → K K-maximum reduction of -57%. (C) Only Bs → K π-decay channel, new physical corrected its direct CP violation enhancement of 24% compared to the standard model. Chapter Finally, we also calculated the time decay channels mixed CP violation observables Sf, Hf. Sf, Hf decay channels for all 13 new physical correction is not large. Final chapter, the full text of a summary, the and B physics research to do in the next few years to discuss and outlook.

Related Dissertations

  1. Research on Some Problems for Identity-Based Authenticated Key Agreement Protocols,TN918.1
  2. Some Applications of Nonstandard Analysis in Fuzzy Topology,O189.13
  3. One-loop Electroweak Corrections to Electron-positron Pair Production Via Two Photon Collisions in the SM,O572.2
  4. Research on Identity Based Identification and Its Application,TP393.08
  5. Research on Wind Load Distribution of Cable-Membrane Structure with the Numerical Wind Tunnel Method,TU312.1
  6. The Phenomenology of Singlet Fermionic Dark-Matter,P145.9
  7. Design and Analysis of Authenticated Key Establishment Protocols Based on CPK or Password,TN918.1
  8. Ergodic Matrices and Its Applications in Public Key Cryptography,TN918
  9. Study of Electroweak Chiral Lagrangian from Strong Dynamical Models,O572.243
  10. Research on Delegation Based Digital Signature,TN918
  11. Studies of the high-energy collider a number of new physical phenomena,O572.214
  12. Linear collider four-body final state QCD corrections research process,O572.214
  13. Study and Design of Universal Designated Verifier Signature Schemes,TN918.1
  14. Analysis and Design of Authentication and Key Exchange Protocols,TP393.08
  15. With the LHC top quark pair Z ~ 0 / h ~ 0 generated in the process of supersymmetric QCD effects and CP violation,O572.2
  16. Design and Analysis of Authenticated Key Exchange Protocols,TN918.1
  17. SUSY Signatures from gd→(?)_i(?)_j~- at LHC,O572.2
  18. The Research of China Mobile’s International Competitiveness Evaluation Index System Based on Scale Model,F626
  19. Applicability of low embankment highway program,U416.12
  20. Left ventricular function mapping model based on three-dimensional mechanical movement pacing cardiac function evaluation,R318.01

CLC: > Mathematical sciences and chemical > Physics > Nuclear physics,high energy physics > High-energy physics > Particle types > Meson
© 2012 www.DissertationTopic.Net  Mobile