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Sep
23
accepted Chiral anomalies
Sep
21
reviewed Approve suggested edit on Can light waves cause beats?
Sep
20
reviewed Approve suggested edit on How did Pauli and Fermi deduce the existence of the neutrino?
Sep
20
reviewed Approve suggested edit on Does gravity slow the expansion of the universe?
Sep
20
reviewed Approve suggested edit on How to calculate angle of inclination attained by a weigh balance on unequal loading?
Sep
19
revised Chiral anomalies
added 56 characters in body
Sep
19
asked Chiral anomalies
Sep
17
comment Is there a relationship between the energy of a photon and the energy of an electromagnetic wave?
@J.D'Alembert : I have answered to the chat.
Sep
16
reviewed Approve suggested edit on Show: Lorentz-invariance of solution of Klein-Gordon equation
Sep
16
reviewed Approve suggested edit on When drift velocity equals thermal velocity?
Sep
16
revised Determine if Theory is Unitary from Lagrangian
added 69 characters in body
Sep
16
comment Determine if Theory is Unitary from Lagrangian
@PhysStudent : If you'll wait a little (I hope), you'll get an example of corresponding calculation (I'm writing about an article). As about $p_{cm}$, it's momentum of one particle at center of mass frame.
Sep
15
comment A basic math identity often used in integrals
You may diagonalize $\hat{A}$: $\hat{A} = \hat{U}\hat{A}{'}\hat{U}^{T}$, where $det U = 1 , \hat{A}{'} = diag (A_{1}, ...)$. Then $det A = det U det A{'}det U^{T} = det A{'}$.
Sep
15
comment Is there a relationship between the energy of a photon and the energy of an electromagnetic wave?
@J.D'Alembert : I'll answer in a few hours, if you please.
Sep
15
reviewed Approve suggested edit on Is voltage always proportional to its derivative?
Sep
15
comment Is there a relationship between the energy of a photon and the energy of an electromagnetic wave?
@J.D'Alembert : excuse me for the long periods between the answers. You can rewrite $\hat{a}^{\dagger}_{\lambda}(\mathbf p)\hat{a}_{\lambda}(\mathbf p)$ through fields $\hat{\mathbf A}$ and then to get expression similar to $(3)$. But creation/destruction operators are in some sense the most elementary quantities.
Sep
15
comment How to get the relation for dependence of anomalous dimension on regularization?
@Orbifold : and please check my comment about $n$ factor.
Sep
15
comment How to get the relation for dependence of anomalous dimension on regularization?
@Orbifold : here is the set of actions: $$ \tilde {\gamma}_{\Gamma}(\tilde{g}) - \gamma_{\Gamma} (g) - q(g)\beta (g)\partial_{g} \frac{1}{q(g)} = 0 \Rightarrow \tilde {\gamma}_{\Gamma}(\tilde{g}) = \gamma_{\Gamma}(g) + q(g)\beta (g)\partial_{g} \frac{1}{q(g)} = $$ $$ = \gamma_{\Gamma}(g) - \beta(g)q(g)\frac{q'(g)}{q^{2}(q)} = \gamma_{\Gamma}(g) - \beta (g)\partial_{g}ln (q(g)). $$
Sep
15
comment How to get the relation for dependence of anomalous dimension on regularization?
@Orbifold : as for the first one, it's only the redefinition of the definition of $Z$-constant (as you can see from OP definition, there is $Z^{-1}$, not $Z^{-n}$ at n-point function.
Sep
15
comment How to get the relation for dependence of anomalous dimension on regularization?
@Orbifold : as for the second, the relative $-$ sign have arised from derivation of $\frac{1}{q(g)}$ function: $$ q(g)\partial_{g}\frac{1}{q(g)} = -q(g)\frac{q(g)'}{q^{2}(q)} = -\partial_{g}ln(q(g)). $$ As for the first, the OP definition