Breakdown of Qcd Factorization Theorems for Inclusive Reactions
نویسنده
چکیده
Initial state interactions are shown to violate standard factorization for massive lepton pair production and hadron-induced hard-scattering inclusive reactions order-by-order in QCD perturbation theory. Initial and final state interactions lead to a number of new physical phenomena including kl fluctuations, color correlations, anomalous nuclear number dependence of inclusive cross sections, and induced hadron production in the central rapidity region.
منابع مشابه
B?J/?(?,K) Decays within QCD Factorization Approach
We used QCD factorization for the hadronic matrix elements to show that the existing data, in particular the branching ratios BR ( ?J/?K) and BR ( ?J/??), can be accounted for this approach. We analyzed the decay within the framework of QCD factorization. We have complete calculation of the relevant hard-scattering kernels for twist-2 and twist-3. We calculated this decays in a special scale ...
متن کاملPerturbative QCD analysis of B ( B → Xlν̄ ) , charm yield 〈 n c 〉 in B decay
Perturbative QCD analysis of B(B → Xl¯ ν), charm yield n c in B decay, and τ (Λ b)/τ (B d) Abstract We apply perturbative QCD factorization theorems to inclusive heavy hadron decays, and obtain simultaneously a low semileptonic branching ratio B(B → Xl¯ ν) = 10.16%, the average charm yield n c = 1.17 per B decay, a small lifetime ratio τ (Λ b)/τ (B d) = 0.78, and the correct absolute decay widt...
متن کاملA General Formalism for Single and Double Spin Asymmetries in Inclusive Hadron Production
We present a calculation of single and double spin asymmetries for inclusive hadron production in hadronic collisions. Our approach is based on Leading Order (LO) perturbative QCD and generalized factorization theorems, with full account of intrinsic parton momentum, k⊥, effects. This leads to a new class of spin and k⊥dependent distribution and fragmentation functions. Limiting ourselves to co...
متن کاملFactorization and Other Novel Effects in Qcd*
Recent progress in proving the validity of factorization for inclusive reactions in QCD is reviewed. A new necessary condition involving the target length is emphasized. We also discuss a number of novel effects in gauge theory including null zone phenomena, color transparency, formation zone conditions, and possible heavy quark Fock states components in ordinary hadrons. Invited talk presented...
متن کاملExclusive and Semi-inclusive B Decays in QCD Factorization
Applications of QCD factorization to B → φK, charmless B → V V , B → J/ψK(K∗) and semi-inclusive decays B →MX are discussed.
متن کامل