Measurement of the D+ -meson production cross section at low transverse momentum in pp¯ collisions at s=1.96 TeV
- Aaltonen, T;
- Amerio, S;
- Amidei, D;
- Anastassov, A;
- Annovi, A;
- Antos, J;
- Apollinari, G;
- Appel, JA;
- Arisawa, T;
- Artikov, A;
- Asaadi, J;
- Ashmanskas, W;
- Auerbach, B;
- Aurisano, A;
- Azfar, F;
- Badgett, W;
- Bae, T;
- Barbaro-Galtieri, A;
- Barnes, VE;
- Barnett, BA;
- Barria, P;
- Bartos, P;
- Bauce, M;
- Bedeschi, F;
- Behari, S;
- Bellettini, G;
- Bellinger, J;
- Benjamin, D;
- Beretvas, A;
- Bhatti, A;
- Bland, KR;
- Blumenfeld, B;
- Bocci, A;
- Bodek, A;
- Bortoletto, D;
- Boudreau, J;
- Boveia, A;
- Brigliadori, L;
- Bromberg, C;
- Brucken, E;
- Budagov, J;
- Budd, HS;
- Burkett, K;
- Busetto, G;
- Bussey, P;
- Butti, P;
- Buzatu, A;
- Calamba, A;
- Camarda, S;
- Campanelli, M;
- Canelli, F;
- Carls, B;
- Carlsmith, D;
- Carosi, R;
- Carrillo, S;
- Casal, B;
- Casarsa, M;
- Castro, A;
- Catastini, P;
- Cauz, D;
- Cavaliere, V;
- Cerri, A;
- Cerrito, L;
- Chen, YC;
- Chertok, M;
- Chiarelli, G;
- Chlachidze, G;
- Cho, K;
- Chokheli, D;
- Clark, A;
- Clarke, C;
- Convery, ME;
- Conway, J;
- Corbo, M;
- Cordelli, M;
- Cox, CA;
- Cox, DJ;
- Cremonesi, M;
- Cruz, D;
- Cuevas, J;
- Culbertson, R;
- D'Ascenzo, N;
- Datta, M;
- De Barbaro, P;
- Demortier, L;
- Deninno, M;
- D'Errico, M;
- Devoto, F;
- Di Canto, A;
- Di Ruzza, B;
- Dittmann, JR;
- Donati, S;
- D'Onofrio, M;
- Dorigo, M;
- Driutti, A;
- Ebina, K;
- Edgar, R;
- Erbacher, R;
- Errede, S;
- Esham, B
- et al.
Published Web Location
http://doi.org/10.1103/PhysRevD.95.092006Abstract
We report on a measurement of the D+-meson production cross section as a function of transverse momentum (pT) in proton-antiproton (pp) collisions at 1.96 TeV center-of-mass energy, using the full data set collected by the Collider Detector at Fermilab in Tevatron Run II and corresponding to 10 fb-1 of integrated luminosity. We use D+→K-π+π+ decays fully reconstructed in the central rapidity region |y|<1 with transverse momentum down to 1.5 GeV/c, a range previously unexplored in pp collisions. Inelastic pp-scattering events are selected online using minimally biasing requirements followed by an optimized offline selection. The K-π+π+ mass distribution is used to identify the D+ signal, and the D+ transverse impact-parameter distribution is used to separate prompt production, occurring directly in the hard-scattering process, from secondary production from b-hadron decays. We obtain a prompt D+ signal of 2950 candidates corresponding to a total cross section σ(D+,1.5
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