equation_database.isbn_9780511628788

Functions

bibtex()

DOI, QCD and collider physics

table_7_1_gg_gg([s, t, u])

\(gg \to gg\)

table_7_1_gg_qqb([s, t, u])

\(gg \to q\bar{q}\)

table_7_1_gq_gq([s, t, u])

\(gq \to gq\)

table_7_1_qq_qq([s, t, u])

\(qq \to qq\)

table_7_1_qqb_gg([s, t, u])

\(q\bar{q} \to gg\)

table_7_1_qqb_qpqpb([s, t, u])

\(q\bar{q} \to q'\bar{q}'\)

table_7_1_qqb_qqb([s, t, u])

\(q\bar{q} \to q\bar{q}\)

table_7_1_qqp_qqp([s, t, u])

\(qq' \to qq'\)

table_7_1_qqpb_qqpb([s, t, u])

\(q\bar{q}' \to q\bar{q}'\)

table_7_2_gq_aq([s, t, u, N])

\(gq \to \gamma^* q\)

table_7_2_qq_ag([s, t, u, N])

\(q\bar q \to \gamma^* g\)

equation_database.isbn_9780511628788.table_7_1_qqp_qqp(s=s, t=t, u=u)[source]

\(qq' \to qq'\)

The invariant matrix elements squared for two-to-two parton subprocesses with massless partons. The colour and spin indices are averaged (summed) over initial (final) states.

Parameters:
  • s – Mandelstam variable s

  • t – Mandelstam variable t

  • u – Mandelstam variable u

Returns:

\(\frac{\frac{4 s^{2}}{9} + \frac{4 u^{2}}{9}}{t^{2}}\),

\frac{\frac{4 s^{2}}{9} + \frac{4 u^{2}}{9}}{t^{2}}
equation_database.isbn_9780511628788.table_7_1_qqpb_qqpb(s=s, t=t, u=u)[source]

\(q\bar{q}' \to q\bar{q}'\)

The invariant matrix elements squared for two-to-two parton subprocesses with massless partons. The colour and spin indices are averaged (summed) over initial (final) states.

Parameters:
  • s – Mandelstam variable s

  • t – Mandelstam variable t

  • u – Mandelstam variable u

Returns:

\(\frac{\frac{4 s^{2}}{9} + \frac{4 u^{2}}{9}}{t^{2}}\),

\frac{\frac{4 s^{2}}{9} + \frac{4 u^{2}}{9}}{t^{2}}
equation_database.isbn_9780511628788.table_7_1_qq_qq(s=s, t=t, u=u)[source]

\(qq \to qq\)

The invariant matrix elements squared for two-to-two parton subprocesses with massless partons. The colour and spin indices are averaged (summed) over initial (final) states.

Parameters:
  • s – Mandelstam variable s

  • t – Mandelstam variable t

  • u – Mandelstam variable u

Returns:

\(- \frac{8 s^{2}}{27 t u} + \frac{4 \left(s^{2} + t^{2}\right)}{9 u^{2}} + \frac{4 \left(s^{2} + u^{2}\right)}{9 t^{2}}\),

- \frac{8 s^{2}}{27 t u} + \frac{4 \left(s^{2} + t^{2}\right)}{9 u^{2}} + \frac{4 \left(s^{2} + u^{2}\right)}{9 t^{2}}
equation_database.isbn_9780511628788.table_7_1_qqb_qpqpb(s=s, t=t, u=u)[source]

\(q\bar{q} \to q'\bar{q}'\)

The invariant matrix elements squared for two-to-two parton subprocesses with massless partons. The colour and spin indices are averaged (summed) over initial (final) states.

Parameters:
  • s – Mandelstam variable s

  • t – Mandelstam variable t

  • u – Mandelstam variable u

Returns:

\(\frac{4 \left(t^{2} + u^{2}\right)}{9 s^{2}}\),

\frac{4 \left(t^{2} + u^{2}\right)}{9 s^{2}}
equation_database.isbn_9780511628788.table_7_1_qqb_qqb(s=s, t=t, u=u)[source]

\(q\bar{q} \to q\bar{q}\)

The invariant matrix elements squared for two-to-two parton subprocesses with massless partons. The colour and spin indices are averaged (summed) over initial (final) states.

Parameters:
  • s – Mandelstam variable s

  • t – Mandelstam variable t

  • u – Mandelstam variable u

Returns:

\(\frac{4 \left(s^{2} + u^{2}\right)}{9 t^{2}} - \frac{8 u^{2}}{27 s t} + \frac{4 \left(t^{2} + u^{2}\right)}{9 s^{2}}\),

\frac{4 \left(s^{2} + u^{2}\right)}{9 t^{2}} - \frac{8 u^{2}}{27 s t} + \frac{4 \left(t^{2} + u^{2}\right)}{9 s^{2}}
equation_database.isbn_9780511628788.table_7_1_qqb_gg(s=s, t=t, u=u)[source]

\(q\bar{q} \to gg\)

The invariant matrix elements squared for two-to-two parton subprocesses with massless partons. The colour and spin indices are averaged (summed) over initial (final) states.

Parameters:
  • s – Mandelstam variable s

  • t – Mandelstam variable t

  • u – Mandelstam variable u

Returns:

\(\frac{\frac{32 t^{2}}{27} + \frac{32 u^{2}}{27}}{t u} - \frac{\frac{8 t^{2}}{3} + \frac{8 u^{2}}{3}}{s^{2}}\),

\frac{\frac{32 t^{2}}{27} + \frac{32 u^{2}}{27}}{t u} - \frac{\frac{8 t^{2}}{3} + \frac{8 u^{2}}{3}}{s^{2}}
equation_database.isbn_9780511628788.table_7_1_gg_qqb(s=s, t=t, u=u)[source]

\(gg \to q\bar{q}\)

The invariant matrix elements squared for two-to-two parton subprocesses with massless partons. The colour and spin indices are averaged (summed) over initial (final) states.

Parameters:
  • s – Mandelstam variable s

  • t – Mandelstam variable t

  • u – Mandelstam variable u

Returns:

\(\frac{\frac{t^{2}}{6} + \frac{u^{2}}{6}}{t u} - \frac{\frac{3 t^{2}}{8} + \frac{3 u^{2}}{8}}{s^{2}}\),

\frac{\frac{t^{2}}{6} + \frac{u^{2}}{6}}{t u} - \frac{\frac{3 t^{2}}{8} + \frac{3 u^{2}}{8}}{s^{2}}
equation_database.isbn_9780511628788.table_7_1_gq_gq(s=s, t=t, u=u)[source]

\(gq \to gq\)

The invariant matrix elements squared for two-to-two parton subprocesses with massless partons. The colour and spin indices are averaged (summed) over initial (final) states.

Parameters:
  • s – Mandelstam variable s

  • t – Mandelstam variable t

  • u – Mandelstam variable u

Returns:

\(\frac{s^{2} + u^{2}}{t^{2}} + \frac{- \frac{4 s^{2}}{9} - \frac{4 u^{2}}{9}}{s u}\),

\frac{s^{2} + u^{2}}{t^{2}} + \frac{- \frac{4 s^{2}}{9} - \frac{4 u^{2}}{9}}{s u}
equation_database.isbn_9780511628788.table_7_1_gg_gg(s=s, t=t, u=u)[source]

\(gg \to gg\)

The invariant matrix elements squared for two-to-two parton subprocesses with massless partons. The colour and spin indices are averaged (summed) over initial (final) states.

Parameters:
  • s – Mandelstam variable s

  • t – Mandelstam variable t

  • u – Mandelstam variable u

Returns:

\(- \frac{9 s t}{2 u^{2}} - \frac{9 s u}{2 t^{2}} + \frac{27}{2} - \frac{9 t u}{2 s^{2}}\),

- \frac{9 s t}{2 u^{2}} - \frac{9 s u}{2 t^{2}} + \frac{27}{2} - \frac{9 t u}{2 s^{2}}
equation_database.isbn_9780511628788.table_7_2_qq_ag(s=s, t=t, u=u, N=N)[source]

\(q\bar q \to \gamma^* g\)

Lowest order processes for virtual photon production. The colour and spin indices are averaged (summed) over initial (final) states. For a real photon (s + t + u) = 0 and for SU(3) we have N = 3

Parameters:
  • s – Mandelstam variable s

  • t – Mandelstam variable t

  • u – Mandelstam variable u

  • N – Number of colors

Returns:

\(\frac{\left(N^{2} - 1\right) \left(2 s \left(s + t + u\right) + t^{2} + u^{2}\right)}{N^{2} t u}\),

\frac{\left(N^{2} - 1\right) \left(2 s \left(s + t + u\right) + t^{2} + u^{2}\right)}{N^{2} t u}
equation_database.isbn_9780511628788.table_7_2_gq_aq(s=s, t=t, u=u, N=N)[source]

\(gq \to \gamma^* q\)

Lowest order processes for virtual photon production. The colour and spin indices are averaged (summed) over initial (final) states. For a real photon (s + t + u) = 0 and for SU(3) we have N = 3

Parameters:
  • s – Mandelstam variable s

  • t – Mandelstam variable t

  • u – Mandelstam variable u

  • N – Number of colors

Returns:

\(- \frac{s^{2} + \frac{t \left(s + t + u\right)}{u} + u^{2}}{N}\),

- \frac{s^{2} + \frac{t \left(s + t + u\right)}{u} + u^{2}}{N}
equation_database.isbn_9780511628788.bibtex()[source]

DOI, QCD and collider physics

@book{Ellis:1996mzs,
    author = "Ellis, R. Keith and Stirling, W. James and Webber, B. R.",
    title = "{QCD and collider physics}",
    doi = "10.1017/CBO9780511628788",
    isbn = "978-0-511-82328-2, 978-0-521-54589-1",
    publisher = "Cambridge University Press",
    volume = "8",
    month = "2",
    year = "2011"
}