Comparison of the isolated direct photon cross sections in pp̄ collisions at √s = 1.8 TeV and √s = 0.63 TeV

D. Acosta; T. Affolder; H. Akimoto; M. G. Albrow; D. Ambrose; D. Amidei; K. Anikeev; J. Antos; G. Apollinari; T. Arisawa; A. Artikov; T. Asakawa; W. Ashmanskas; F. Azfar; P. Azzi-Bacchetta; N. Bacchetta; H. Bachacou; W. Badgett; S. Bailey; P. De Barbaro; A. Barbaro-Galtieri; V. E. Barnes; B. A. Barnett; S. Baroiant; M. Barone; G. Bauer; F. Bedeschi; S. Belforte; W. H. Bell; G. Bellettini; J. Bellinger; D. Benjamin; J. Bensinger; A. Beretvas; J. P. Berge; J. Berryhill; A. Bhatti; M. Binkley; D. Bisello; M. Bishai; R. E. Blair; C. Blocker; K. Bloom; B. Blumenfeld; S. R. Blusk; A. Bocci; A. Bodek; G. Bolla; Y. Bonushkin; D. Bortoletto; J. Boudreau; A. Brandl; S. Van Den Brink; C. Bromberg; M. Brozovic; E. Brubaker; N. Bruner; J. Budagov; H. S. Budd; K. Burkett; G. Busetto; A. Byon-Wagner; K. L. Byrum; S. Cabrera; P. Calafiura; M. Campbell; W. Carithers; J. Carlson; D. Carlsmith; W. Caskey; A. Castro; D. Cauz; A. Cerri; A. W. Chan; P. S. Chang; P. T. Chang; J. Chapman; C. Chen; Y. C. Chen; M. T. Cheng; M. Chertok; G. Chiarelli; I. Chirikov-Zorin; G. Chlachidze; F. Chlebana; L. Christofek; M. L. Chu; J. Y. Chung; W. H. Chung; Y. S. Chung; C. I. Ciobanu; A. G. Clark; M. Coca; A. P. Colijn; A. Connolly; M. Convery; J. Conway; M. Cordelli; J. Cranshaw

doi:10.1103/PhysRevD.65.112003

Comparison of the isolated direct photon cross sections in pp̄ collisions at √s = 1.8 TeV and √s = 0.63 TeV

D. Acosta^*, T. Affolder, H. Akimoto, M. G. Albrow, D. Ambrose, D. Amidei, K. Anikeev, J. Antos, G. Apollinari, T. Arisawa, A. Artikov, T. Asakawa, W. Ashmanskas, F. Azfar, P. Azzi-Bacchetta, N. Bacchetta, H. Bachacou, W. Badgett, S. Bailey, P. De BarbaroA. Barbaro-Galtieri, V. E. Barnes, B. A. Barnett, S. Baroiant, M. Barone, G. Bauer, F. Bedeschi, S. Belforte, W. H. Bell, G. Bellettini, J. Bellinger, D. Benjamin, J. Bensinger, A. Beretvas, J. P. Berge, J. Berryhill, A. Bhatti, M. Binkley, D. Bisello, M. Bishai, R. E. Blair, C. Blocker, K. Bloom, B. Blumenfeld, S. R. Blusk, A. Bocci, A. Bodek, G. Bolla, Y. Bonushkin, D. Bortoletto, J. Boudreau, A. Brandl, S. Van Den Brink, C. Bromberg, M. Brozovic, E. Brubaker, N. Bruner, J. Budagov, H. S. Budd, K. Burkett, G. Busetto, A. Byon-Wagner, K. L. Byrum, S. Cabrera, P. Calafiura, M. Campbell, W. Carithers, J. Carlson, D. Carlsmith, W. Caskey, A. Castro, D. Cauz, A. Cerri, A. W. Chan, P. S. Chang, P. T. Chang, J. Chapman, C. Chen, Y. C. Chen, M. T. Cheng, M. Chertok, G. Chiarelli, I. Chirikov-Zorin, G. Chlachidze, F. Chlebana, L. Christofek, M. L. Chu, J. Y. Chung, W. H. Chung, Y. S. Chung, C. I. Ciobanu, A. G. Clark, M. Coca, A. P. Colijn, A. Connolly, M. Convery, J. Conway, M. Cordelli, J. Cranshaw

^*この研究の対応する著者

高等学院

研究成果: Article › 査読

68 被引用数 (Scopus)

抄録

We have measured the cross sections d²σ/d P _Td_η) for production of isolated direct photons in pp̄ collisions at two different center-of-mass energies, 1.8 TeV and 0.63 TeV, using the Collider Detector at Fermilab. The normalization of both data sets agrees with the predictions of quantum chromodynamics for a photon transverse momentum (P_T) of 25 GeV/c, but the shapes versus photon P_T do not. These shape differences lead to a significant disagreement in the ratio of cross sections in the scaling variable x^T(≡ 2P_T/√s). This disagreement in the x_T ratio is difficult to explain with conventional theoretical uncertainties such as scale dependence and parton distribution parametrizations.

本文言語	English
論文番号	112003
ジャーナル	Physical Review D
巻	65
号	11
DOI	https://doi.org/10.1103/PhysRevD.65.112003
出版ステータス	Published - 2002

ASJC Scopus subject areas

核物理学および高エネルギー物理学

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10.1103/PhysRevD.65.112003

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Acosta, D., Affolder, T., Akimoto, H., Albrow, M. G., Ambrose, D., Amidei, D., Anikeev, K., Antos, J., Apollinari, G., Arisawa, T., Artikov, A., Asakawa, T., Ashmanskas, W., Azfar, F., Azzi-Bacchetta, P., Bacchetta, N., Bachacou, H., Badgett, W., Bailey, S., ... Cranshaw, J. (2002). Comparison of the isolated direct photon cross sections in pp̄ collisions at √s = 1.8 TeV and √s = 0.63 TeV. Physical Review D, 65(11), [112003]. https://doi.org/10.1103/PhysRevD.65.112003

Acosta, D, Affolder, T, Akimoto, H, Albrow, MG, Ambrose, D, Amidei, D, Anikeev, K, Antos, J, Apollinari, G, Arisawa, T, Artikov, A, Asakawa, T, Ashmanskas, W, Azfar, F, Azzi-Bacchetta, P, Bacchetta, N, Bachacou, H, Badgett, W, Bailey, S, De Barbaro, P, Barbaro-Galtieri, A, Barnes, VE, Barnett, BA, Baroiant, S, Barone, M, Bauer, G, Bedeschi, F, Belforte, S, Bell, WH, Bellettini, G, Bellinger, J, Benjamin, D, Bensinger, J, Beretvas, A, Berge, JP, Berryhill, J, Bhatti, A, Binkley, M, Bisello, D, Bishai, M, Blair, RE, Blocker, C, Bloom, K, Blumenfeld, B, Blusk, SR, Bocci, A, Bodek, A, Bolla, G, Bonushkin, Y, Bortoletto, D, Boudreau, J, Brandl, A, Van Den Brink, S, Bromberg, C, Brozovic, M, Brubaker, E, Bruner, N, Budagov, J, Budd, HS, Burkett, K, Busetto, G, Byon-Wagner, A, Byrum, KL, Cabrera, S, Calafiura, P, Campbell, M, Carithers, W, Carlson, J, Carlsmith, D, Caskey, W, Castro, A, Cauz, D, Cerri, A, Chan, AW, Chang, PS, Chang, PT, Chapman, J, Chen, C, Chen, YC, Cheng, MT, Chertok, M, Chiarelli, G, Chirikov-Zorin, I, Chlachidze, G, Chlebana, F, Christofek, L, Chu, ML, Chung, JY, Chung, WH, Chung, YS, Ciobanu, CI, Clark, AG, Coca, M, Colijn, AP, Connolly, A, Convery, M, Conway, J, Cordelli, M & Cranshaw, J 2002, 'Comparison of the isolated direct photon cross sections in pp̄ collisions at √s = 1.8 TeV and √s = 0.63 TeV', Physical Review D, vol. 65, no. 11, 112003. https://doi.org/10.1103/PhysRevD.65.112003

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title = "Comparison of the isolated direct photon cross sections in p{\=p} collisions at √s = 1.8 TeV and √s = 0.63 TeV",

abstract = "We have measured the cross sections d2σ/d P Tdη) for production of isolated direct photons in p{\=p} collisions at two different center-of-mass energies, 1.8 TeV and 0.63 TeV, using the Collider Detector at Fermilab. The normalization of both data sets agrees with the predictions of quantum chromodynamics for a photon transverse momentum (PT) of 25 GeV/c, but the shapes versus photon PT do not. These shape differences lead to a significant disagreement in the ratio of cross sections in the scaling variable xT(≡ 2PT/√s). This disagreement in the xT ratio is difficult to explain with conventional theoretical uncertainties such as scale dependence and parton distribution parametrizations.",

author = "D. Acosta and T. Affolder and H. Akimoto and Albrow, {M. G.} and D. Ambrose and D. Amidei and K. Anikeev and J. Antos and G. Apollinari and T. Arisawa and A. Artikov and T. Asakawa and W. Ashmanskas and F. Azfar and P. Azzi-Bacchetta and N. Bacchetta and H. Bachacou and W. Badgett and S. Bailey and {De Barbaro}, P. and A. Barbaro-Galtieri and Barnes, {V. E.} and Barnett, {B. A.} and S. Baroiant and M. Barone and G. Bauer and F. Bedeschi and S. Belforte and Bell, {W. H.} and G. Bellettini and J. Bellinger and D. Benjamin and J. Bensinger and A. Beretvas and Berge, {J. P.} and J. Berryhill and A. Bhatti and M. Binkley and D. Bisello and M. Bishai and Blair, {R. E.} and C. Blocker and K. Bloom and B. Blumenfeld and Blusk, {S. R.} and A. Bocci and A. Bodek and G. Bolla and Y. Bonushkin and D. Bortoletto and J. Boudreau and A. Brandl and {Van Den Brink}, S. and C. Bromberg and M. Brozovic and E. Brubaker and N. Bruner and J. Budagov and Budd, {H. S.} and K. Burkett and G. Busetto and A. Byon-Wagner and Byrum, {K. L.} and S. Cabrera and P. Calafiura and M. Campbell and W. Carithers and J. Carlson and D. Carlsmith and W. Caskey and A. Castro and D. Cauz and A. Cerri and Chan, {A. W.} and Chang, {P. S.} and Chang, {P. T.} and J. Chapman and C. Chen and Chen, {Y. C.} and Cheng, {M. T.} and M. Chertok and G. Chiarelli and I. Chirikov-Zorin and G. Chlachidze and F. Chlebana and L. Christofek and Chu, {M. L.} and Chung, {J. Y.} and Chung, {W. H.} and Chung, {Y. S.} and Ciobanu, {C. I.} and Clark, {A. G.} and M. Coca and Colijn, {A. P.} and A. Connolly and M. Convery and J. Conway and M. Cordelli and J. Cranshaw",

year = "2002",

doi = "10.1103/PhysRevD.65.112003",

language = "English",

volume = "65",

journal = "Physical review D: Particles and fields",

issn = "0556-2821",

publisher = "American Institute of Physics Publising LLC",

number = "11",

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TY - JOUR

T1 - Comparison of the isolated direct photon cross sections in pp̄ collisions at √s = 1.8 TeV and √s = 0.63 TeV

AU - Acosta, D.

AU - Affolder, T.

AU - Akimoto, H.

AU - Albrow, M. G.

AU - Ambrose, D.

AU - Amidei, D.

AU - Anikeev, K.

AU - Antos, J.

AU - Apollinari, G.

AU - Arisawa, T.

AU - Artikov, A.

AU - Asakawa, T.

AU - Ashmanskas, W.

AU - Azfar, F.

AU - Azzi-Bacchetta, P.

AU - Bacchetta, N.

AU - Bachacou, H.

AU - Badgett, W.

AU - Bailey, S.

AU - De Barbaro, P.

AU - Barbaro-Galtieri, A.

AU - Barnes, V. E.

AU - Barnett, B. A.

AU - Baroiant, S.

AU - Barone, M.

AU - Bauer, G.

AU - Bedeschi, F.

AU - Belforte, S.

AU - Bell, W. H.

AU - Bellettini, G.

AU - Bellinger, J.

AU - Benjamin, D.

AU - Bensinger, J.

AU - Beretvas, A.

AU - Berge, J. P.

AU - Berryhill, J.

AU - Bhatti, A.

AU - Binkley, M.

AU - Bisello, D.

AU - Bishai, M.

AU - Blair, R. E.

AU - Blocker, C.

AU - Bloom, K.

AU - Blumenfeld, B.

AU - Blusk, S. R.

AU - Bocci, A.

AU - Bodek, A.

AU - Bolla, G.

AU - Bonushkin, Y.

AU - Bortoletto, D.

AU - Boudreau, J.

AU - Brandl, A.

AU - Van Den Brink, S.

AU - Bromberg, C.

AU - Brozovic, M.

AU - Brubaker, E.

AU - Bruner, N.

AU - Budagov, J.

AU - Budd, H. S.

AU - Burkett, K.

AU - Busetto, G.

AU - Byon-Wagner, A.

AU - Byrum, K. L.

AU - Cabrera, S.

AU - Calafiura, P.

AU - Campbell, M.

AU - Carithers, W.

AU - Carlson, J.

AU - Carlsmith, D.

AU - Caskey, W.

AU - Castro, A.

AU - Cauz, D.

AU - Cerri, A.

AU - Chan, A. W.

AU - Chang, P. S.

AU - Chang, P. T.

AU - Chapman, J.

AU - Chen, C.

AU - Chen, Y. C.

AU - Cheng, M. T.

AU - Chertok, M.

AU - Chiarelli, G.

AU - Chirikov-Zorin, I.

AU - Chlachidze, G.

AU - Chlebana, F.

AU - Christofek, L.

AU - Chu, M. L.

AU - Chung, J. Y.

AU - Chung, W. H.

AU - Chung, Y. S.

AU - Ciobanu, C. I.

AU - Clark, A. G.

AU - Coca, M.

AU - Colijn, A. P.

AU - Connolly, A.

AU - Convery, M.

AU - Conway, J.

AU - Cordelli, M.

AU - Cranshaw, J.

PY - 2002

Y1 - 2002

N2 - We have measured the cross sections d2σ/d P Tdη) for production of isolated direct photons in pp̄ collisions at two different center-of-mass energies, 1.8 TeV and 0.63 TeV, using the Collider Detector at Fermilab. The normalization of both data sets agrees with the predictions of quantum chromodynamics for a photon transverse momentum (PT) of 25 GeV/c, but the shapes versus photon PT do not. These shape differences lead to a significant disagreement in the ratio of cross sections in the scaling variable xT(≡ 2PT/√s). This disagreement in the xT ratio is difficult to explain with conventional theoretical uncertainties such as scale dependence and parton distribution parametrizations.

AB - We have measured the cross sections d2σ/d P Tdη) for production of isolated direct photons in pp̄ collisions at two different center-of-mass energies, 1.8 TeV and 0.63 TeV, using the Collider Detector at Fermilab. The normalization of both data sets agrees with the predictions of quantum chromodynamics for a photon transverse momentum (PT) of 25 GeV/c, but the shapes versus photon PT do not. These shape differences lead to a significant disagreement in the ratio of cross sections in the scaling variable xT(≡ 2PT/√s). This disagreement in the xT ratio is difficult to explain with conventional theoretical uncertainties such as scale dependence and parton distribution parametrizations.

UR - http://www.scopus.com/inward/record.url?scp=0036612701&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036612701&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.65.112003

DO - 10.1103/PhysRevD.65.112003

M3 - Article

AN - SCOPUS:0036612701

VL - 65

JO - Physical review D: Particles and fields

JF - Physical review D: Particles and fields

SN - 0556-2821

IS - 11

M1 - 112003

ER -

Comparison of the isolated direct photon cross sections in pp̄ collisions at √s = 1.8 TeV and √s = 0.63 TeV

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