Problem about Energy optimization & BG generator AA->HH group Hiroshima Univ. Nozomi Maeda

present problems 1. About AA->HH Energy optimization. When δκ≠0, how much optimized energy? (δκ is difference from SM.) 2. About BG generator. We want to calculate background with GRACE. (background.... AA->WW->4-fermion)

HHH anomalous coupling think about difference from SM in AA->HH. If δκ=0, influence on cross section. → calculate sensitivity, and select AA->HH energy that makes influence clear.

sensitivity detect efficiency=1, BG=0... sensitivity

calculate cross section calculate AA->HH cross section with Kanemura-san ’ s program. parameters are... Higgs mass m H x parameter δκ

E ee -cross section m H =120GeV, x=4.8

E ee -sensitivity asume that AA Luminosity = 1000fb -1

AA->WW->4-fermion W decay to... W + -> u d-bar, c d-bar, c s-bar, u s-bar W - -> u-bar d, c-bar d, c-bar s,u-bar s thus, AA->WW->4-fermion has 16 final state. → calculate each pattern with GRACE. → GRACE makes Feynman diagram, when adopts several pattern only.

calculating with GRACE Pattern that doesn ’ t put out Feynman diagram. {u, d-bar, c-bar, d}, {c, d-bar, u-bar, d}, {u, s-bar, c-bar, d} {c, s-bar, c-bar, d}, {u, d-bar, u-bar, s}, {u, s-bar, c-bar, s} {c, s-bar, u-bar, s}, {c, d-bar, u-bar, s}, {u, s-bar, u-bar, d} {c, d-bar, c-bar, s} Pattern that puts out Feynman diagram. {u, d-bar, u-bar, d}, {c, s-bar, u-bar, d}, {c, d-bar, c-bar, d} {u, d-bar, c-bar, s}, {c, s-bar, c-bar, s}, {u, s-bar, u-bar, s}

pattern that doesn ’ t contain W Follow 2 pattern, it don ’ t have interaction that contains W. {c, d-bar, c-bar, d}, {u, s-bar, u-bar, s}

Try to calculate with GRACE, about pattern that puts out Feynman diagram. → GRACE can ’ t integrate well... Is it necessary to adjust Kinematics?

Problem about GRACE Interaction that doesn ’ t contain W In fact, all pattern must contain W. Integration → How to resolve these problems? We request Kurihara-san for his cooperate.

in.prc %%%%%%%%%%% Model="sm.mdl"; %%%%%%%%%%% Process; ELWK=4; Initial={photon,photon}; Final ={c, d-bar, c-bar, d}; Expand=Yes; OPI=No; Kinem="2401"; Pend;

change ELWK value …… 0 ～ 3,5 → error more than 6 → error. too many dia- gram generated. change Kinem …… not effective