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A new determination of $\alpha_s$ using direct photon production cross sections in $pp$ and $\overline{p}p$ collisions at $\sqrt{s}=24.3$ GeV
Direct photon production cross sections obtained in high statistics $\bar{p}p$ and $pp$ collisions at $\sqrt{s}=24.3$ GeV at the CERN SPS are used in a next-to-leading order QCD analysis. From the ( stat.)~\pm0.0033\,(syst.)~^{+0.0077}_{-0.0034} \,(t cross section difference $\sigma(\bar{p}p~\to~\ga...
| Autores principales: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Lenguaje: | eng |
| Publicado: |
1999
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1016/S0370-2693(99)00251-8 http://cds.cern.ch/record/380422 |
| _version_ | 1780893379691806720 |
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| author | Werlen, M Ballocchi, G Breedon, R E Camilleri, L L Comtat, C Cool, R L Cox, P T Cushman, P B Dick, Louis Dukes, E C Giacomelli, P Hubbard, D B Jeanneret, J B Joseph, C L Kubischta, Werner Morel, Christian Nguyen-Mau, C Oberson, P Overseth, O E Pagès, J L Perroud, Jean-Pierre Rügger, D Rusack, R W Singh, V Snow, G A Sozzi, G Studer, L Tran, M T Vacchi, A Valenti, G |
| author_facet | Werlen, M Ballocchi, G Breedon, R E Camilleri, L L Comtat, C Cool, R L Cox, P T Cushman, P B Dick, Louis Dukes, E C Giacomelli, P Hubbard, D B Jeanneret, J B Joseph, C L Kubischta, Werner Morel, Christian Nguyen-Mau, C Oberson, P Overseth, O E Pagès, J L Perroud, Jean-Pierre Rügger, D Rusack, R W Singh, V Snow, G A Sozzi, G Studer, L Tran, M T Vacchi, A Valenti, G |
| author_sort | Werlen, M |
| collection | CERN |
| description | Direct photon production cross sections obtained in high statistics $\bar{p}p$ and $pp$ collisions at $\sqrt{s}=24.3$ GeV at the CERN SPS are used in a next-to-leading order QCD analysis. From the ( stat.)~\pm0.0033\,(syst.)~^{+0.0077}_{-0.0034} \,(t cross section difference $\sigma(\bar{p}p~\to~\gamma X)~-~\sigma(pp~\to~\gamma X)$ and quark distributions measured in deep inelastic scattering, a determination of the strong coupling constant, $\alpha_s$, is performed via a measurement of \ms. This measurement yields a value \ms\ = $210 \pm 22 \,(stat.) \pm 44 \,(syst.) ^{+105}_{-36} \,(theo.)$ MeV. The corresponding value of $\alpha_s$ expressed at $M^2_Z$ is $\alpha_s(M^2_Z)=0.1112~\pm0.0016\, |
| id | cern-380422 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 1999 |
| record_format | invenio |
| spelling | cern-3804222019-09-30T06:29:59Zdoi:10.1016/S0370-2693(99)00251-8http://cds.cern.ch/record/380422engWerlen, MBallocchi, GBreedon, R ECamilleri, L LComtat, CCool, R LCox, P TCushman, P BDick, LouisDukes, E CGiacomelli, PHubbard, D BJeanneret, J BJoseph, C LKubischta, WernerMorel, ChristianNguyen-Mau, COberson, POverseth, O EPagès, J LPerroud, Jean-PierreRügger, DRusack, R WSingh, VSnow, G ASozzi, GStuder, LTran, M TVacchi, AValenti, GA new determination of $\alpha_s$ using direct photon production cross sections in $pp$ and $\overline{p}p$ collisions at $\sqrt{s}=24.3$ GeVParticle Physics - ExperimentDirect photon production cross sections obtained in high statistics $\bar{p}p$ and $pp$ collisions at $\sqrt{s}=24.3$ GeV at the CERN SPS are used in a next-to-leading order QCD analysis. From the ( stat.)~\pm0.0033\,(syst.)~^{+0.0077}_{-0.0034} \,(t cross section difference $\sigma(\bar{p}p~\to~\gamma X)~-~\sigma(pp~\to~\gamma X)$ and quark distributions measured in deep inelastic scattering, a determination of the strong coupling constant, $\alpha_s$, is performed via a measurement of \ms. This measurement yields a value \ms\ = $210 \pm 22 \,(stat.) \pm 44 \,(syst.) ^{+105}_{-36} \,(theo.)$ MeV. The corresponding value of $\alpha_s$ expressed at $M^2_Z$ is $\alpha_s(M^2_Z)=0.1112~\pm0.0016\,CERN-EP-99-021oai:cds.cern.ch:3804221999-02-15 |
| spellingShingle | Particle Physics - Experiment Werlen, M Ballocchi, G Breedon, R E Camilleri, L L Comtat, C Cool, R L Cox, P T Cushman, P B Dick, Louis Dukes, E C Giacomelli, P Hubbard, D B Jeanneret, J B Joseph, C L Kubischta, Werner Morel, Christian Nguyen-Mau, C Oberson, P Overseth, O E Pagès, J L Perroud, Jean-Pierre Rügger, D Rusack, R W Singh, V Snow, G A Sozzi, G Studer, L Tran, M T Vacchi, A Valenti, G A new determination of $\alpha_s$ using direct photon production cross sections in $pp$ and $\overline{p}p$ collisions at $\sqrt{s}=24.3$ GeV |
| title | A new determination of $\alpha_s$ using direct photon production cross sections in $pp$ and $\overline{p}p$ collisions at $\sqrt{s}=24.3$ GeV |
| title_full | A new determination of $\alpha_s$ using direct photon production cross sections in $pp$ and $\overline{p}p$ collisions at $\sqrt{s}=24.3$ GeV |
| title_fullStr | A new determination of $\alpha_s$ using direct photon production cross sections in $pp$ and $\overline{p}p$ collisions at $\sqrt{s}=24.3$ GeV |
| title_full_unstemmed | A new determination of $\alpha_s$ using direct photon production cross sections in $pp$ and $\overline{p}p$ collisions at $\sqrt{s}=24.3$ GeV |
| title_short | A new determination of $\alpha_s$ using direct photon production cross sections in $pp$ and $\overline{p}p$ collisions at $\sqrt{s}=24.3$ GeV |
| title_sort | new determination of $\alpha_s$ using direct photon production cross sections in $pp$ and $\overline{p}p$ collisions at $\sqrt{s}=24.3$ gev |
| topic | Particle Physics - Experiment |
| url | https://dx.doi.org/10.1016/S0370-2693(99)00251-8 http://cds.cern.ch/record/380422 |
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