Factorization of heavy-to-light form factors in soft-colline(10)
时间:2025-04-03
时间:2025-04-03
Heavy-to-light transition form factors at large recoil energy of the light meson have been conjectured to obey a factorization formula, where the set of form factors is reduced to a smaller number of universal form factors up to hard-scattering corrections
Thehard-collinearintegralsareidenticalastheyshouldbe,becausethetwointegralsdi eronlyatthesmallscaleλ4.Thecollinearcontributionisnowgivenby
′Ic= 1
2p′·l δ 1
0duπd/2 1 1
Itisverylikelythatwithmoreloops,moremodesofsuccessivelysmallervirtualitymustbeintroduced,withnolowerlimitonthevirtualityasthenumberofloopsincreases.3
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