Recent content by Valeriia Lukashenko

Look at Anton Pannekoek Institute (astronomy/astrophysics), Nikhef (they have both computation and astroparticle research) and CWI (computational science, informatics, mathematics)

I guess you were referring to penguin topologies, but I don't get how to draw properly, so I did this diagram, which has virtual quark for sure (I don't know how to understand if W are virtual). Is it okay? I haven't seen such diagrams so far. then my both decays have different topologies. Do I...

Homework Statement Consider decay ##\bar{B^0_s}\rightarrow D^+_s \pi^-## and calculate its mixing-induces CP asymmetry. Homework Equations $$\xi_f^{s}=e^{i\theta_{M_{12}}} \frac{A(\bar{B^0_q}\rightarrow f)}{A(B^0_q \rightarrow f)}=\pm e^{-i\phi_s}\frac{...

Yeah, I guess I was not clear in my question. So, ##\gamma## is defined using "The" unitarity triangle (##V_{ud}V_{ub}^{*}+V_{cd}V_{cb}^{*}+V_{td}V_{tb}^{*}=0##). In the triangle above ##\gamma## appears again. In the picture, it appears in left angle ##\pi - \gamma##. I tried to check if this...

Homework Statement I want to proof for $$V_{us}V^{*}_{ub}+V_{cs}V^{*}_{cb}+V_{ts}V^{*}_{tb}=0$$ unitarity triangle that left angle is $$\pi-\gamma$$ (see below picture from my lecture notes). Homework Equations [/B] $$\gamma \approx - arg(V_{ub})$$ $$\beta_s \approx arg(V_{ts})+\pi$$...

Homework Statement Consider following transformation: Transformation: $$X^{\mu}\rightarrow \tilde{X^{\mu}}= X^{\mu}+\xi^{\mu}(\eta, \vec{x})$$ where ##\xi^0=T, \xi^i=L_i## Show transformation of metric perturbation ##B_i\rightarrow \tilde{B_i}=B_i+\partial_iT-\partial_{\eta}L_i## Homework...

Homework Statement For the following theory: ##\mathcal{L}=\frac{1}{2}[(\partial \phi)^2-m^2\phi^2+(\partial\Phi)^2-M^2\Phi^2]+g\phi^2 \Phi^2## Compute s-channel amplitude for process ##\phi\phi \rightarrow \phi\phi##. Interpret result for ##M>2m##. Homework Equations Scattering amplitude...

Homework Statement So, my textbook proposes a to check what will change in mass and mass eigenvectors of Z and photon in terms of ##W_{3}## and ##B_{\mu}## fields in Higgs mechanism for EW if we choose a vacuum hypercharge to be -1 and compare results to SM (where we know that photon is...