χcJ production associated with a c(c)over-bar pair at hadron colliders

被引：19

作者：

Li, Dan ^{[1
,2
]}

Ma, Yan-Qing ^{[3
]}

Chao, Kuang-Ta ^{[1
,2
,3
]}

机构：

[1] Peking Univ, Dept Phys, Beijing 100871, Peoples R China

[2] Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China

[3] Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China

来源：

PHYSICAL REVIEW D | 2011年 / 83卷 / 11期

基金：

中国国家自然科学基金;

关键词：

J/PSI-PRODUCTION; COLLISIONS; GAMMA;

D O I：

10.1103/PhysRevD.83.114037

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

chi(cJ) (J = 0, 1, 2) production associated with a charm quark pair in hadron collisions is calculated in the framework of nonrelativistic QCD at the Tevatron and LHC. It is found that the color-singlet contribution is small and the color-octet contribution may be dominant in the large p(T) region. The differential cross section of p (p) over bar -> chi(c) + c (c) over bar is at least 1 order of magnitude smaller than the next-to-leading order result of chi(cJ) inclusive production p (p) over bar -> chi(c) + X; therefore chi(cJ) production in p (p) over bar -> chi(c) + c (c) over bar may have negligible influence on the ratio R-chi c = sigma chi c2/sigma chi c1 measured by CDF Collaboration at the Tevatron. The feed-down contribution from chi(cJ) + c + (c) over bar is found to be large compared with J/psi direct production and may have important influence on the measurement of J/psi + c + (c) over bar. The validity of fragmentation approximation for the process is also discussed.

引用

页数：9

共 38 条

[1] Study of inclusive J/ψ production in two-photon collisions at LEP II with the DELPHI detector [J].

Abdallah, J ;

Abreu, P ;

Adam, W ;

Adzic, P ;

Albrecht, T ;

Alderweireld, T ;

Alemany-Fernandez, R ;

Allmendinger, T ;

Allport, PP ;

Almehed, S ;

Amaldi, U ;

Amapane, N ;

Amato, S ;

Anashkin, E ;

Andreazza, A ;

Andringa, S ;

Anjos, N ;

Antilogus, P ;

Apel, WD ;

Arnoud, Y ;

Ask, S ;

Asman, B ;

Augustin, JE ;

Augustinus, A ;

Baillon, P ;

Ballestrero, A ;

Bambade, P ;

Barbier, R ;

Bardin, D ;

Barker, G ;

Baroncelli, A ;

Battaglia, M ;

Baubillier, M ;

Becks, KH ;

Begalli, M ;

Behrmann, A ;

Bellunato, T ;

Belous, K ;

Benekos, N ;

Benvenuti, A ;

Berat, C ;

Berggren, M ;

Berntzon, L ;

Bertrand, D ;

Besancon, M ;

Besson, N ;

Bloch, D ;

Blom, M ;

Bonesini, M ;

Boonekamp, M .

PHYSICS LETTERS B, 2003, 565 (1-4) :76-86

[2] J/psi and psi(2S) production in p(p)over-bar collisions at root s=1.8 TeV [J].

Abe, F ;

Akimoto, H ;

Akopian, A ;

Albrow, MG ;

Amendolia, SR ;

Amidei, D ;

Antos, J ;

Aota, S ;

Apollinari, G ;

Asakawa, T ;

Ashmanskas, W ;

Atac, M ;

Azfar, F ;

AzziBacchetta, P ;

Bacchetta, N ;

Badgett, W ;

Bagdasarov, S ;

Bailey, MW ;

Bao, J ;

deBarbaro, P ;

BarbaroGaltieri, A ;

Barnes, VE ;

Barnett, BA ;

Barone, M ;

Barzi, E ;

Bauer, G ;

Baumann, T ;

Bedeschi, F ;

Behrends, S ;

Belforte, S ;

Bellettini, G ;

Bellinger, J ;

Benjamin, D ;

Benlloch, J ;

Bensinger, J ;

Benton, D ;

Beretvas, A ;

Berge, JP ;

Berryhill, J ;

Bertolucci, S ;

Bevensee, B ;

Bhatti, A ;

Biery, K ;

Binkley, M ;

Bisello, D ;

Blair, RE ;

Blocker, C ;

Bodek, A ;

Bokhari, W ;

Bolognesi, V .

PHYSICAL REVIEW LETTERS, 1997, 79 (04) :572-577

[3]

Abe K, 2002, PHYS REV LETT, V89, DOI [10.1103/PhysRevLett.89.122001, 10.1103/PhysRevLett.89.142001]

[4] J/PSI-PRODUCTION IN THE HADRONIC DECAYS OF THE Z [J].

ABREU, P ;

ADAM, W ;

ADYE, T ;

AGASI, E ;

AJINENKO, I ;

ALEKSAN, R ;

ALEKSEEV, GD ;

ALLPORT, PP ;

ALMEHED, S ;

ALMEIDA, FML ;

ALVSVAAG, SJ ;

AMALDI, U ;

ANDREAZZA, A ;

ANTILOGUS, P ;

APEL, WD ;

APSIMON, RJ ;

ARNOUD, Y ;

ASMAN, B ;

AUGUSTIN, JE ;

AUGUSTINUS, A ;

BAILLON, P ;

BAMBADE, P ;

BARAO, F ;

BARATE, R ;

BARBIELLINI, G ;

BARDIN, DY ;

BARKER, GJ ;

BARONCELLI, A ;

BARRING, O ;

BARRIO, JA ;

BARTL, W ;

BATES, MJ ;

BATTAGLIA, M ;

BAUBILLIER, M ;

BAUDOT, J ;

BECKS, KH ;

BEGALLI, M ;

BEILLIERE, P ;

BELTRAN, P ;

BENVENUTI, AC ;

BERGGREN, M ;

BERTRAND, D ;

BIANCHI, F ;

BIGI, M ;

BILENKY, MS ;

BILLOIR, P ;

BJARNE, J ;

BLOCH, D ;

BLOCKI, J ;

BLYTH, S .

PHYSICS LETTERS B, 1994, 341 (01) :109-122

[5] Measurement of σχc2B(χc2→J/ψγ)/σχc1B(χc1→J/ψγ) in p(p)over-bar collisions at √s=1.96 TeV [J].

Abulencia, A. ;

Adelman, J. ;

Affolder, T. ;

Akimoto, T. ;

Albrow, M. G. ;

Ambrose, D. ;

Amerio, S. ;

Amidei, D. ;

Anastassov, A. ;

Anikeev, K. ;

Annovi, A. ;

Antos, J. ;

Aoki, M. ;

Apollinari, G. ;

Arguin, J. -F. ;

Arisawa, T. ;

Artikov, A. ;

Ashmanskas, W. ;

Attal, A. ;

Azfar, F. ;

Azzi-Bacchetta, P. ;

Azzurri, P. ;

Bacchetta, N. ;

Badgett, W. ;

Barbaro-Galtieri, A. ;

Barnes, V. E. ;

Barnett, B. A. ;

Baroiant, S. ;

Bartsch, V. ;

Bauer, G. ;

Bedeschi, F. ;

Behari, S. ;

Belforte, S. ;

Bellettini, G. ;

Bellinger, J. ;

Belloni, A. ;

Benjamin, D. ;

Beretvas, A. ;

Beringer, J. ;

Berry, T. ;

Bhatti, A. ;

Binkley, M. ;

Bisello, D. ;

Blair, R. E. ;

Blocker, C. ;

Blumenfeld, B. ;

Bocci, A. ;

Bodek, A. ;

Boisvert, V. ;

Bolla, G. .

PHYSICAL REVIEW LETTERS, 2007, 98 (23)

[6] Heavy quarkonium production in Z decays [J].

Acciarri, M ;

Achard, P ;

Adriani, O ;

Aguilar-Benitez, M ;

Alcaraz, J ;

Alemanni, G ;

Allaby, J ;

Aloisio, A ;

Alviggi, MG ;

Ambrosi, G ;

Anderhub, H ;

Andreev, VP ;

Angelescu, T ;

Anselmo, F ;

Arefiev, A ;

Azemoon, T ;

Aziz, T ;

Bagnaia, P ;

Baksay, L ;

Balandras, A ;

Ball, RC ;

Banerjee, S ;

Banicz, K ;

Barczyk, A ;

Barillère, R ;

Barone, L ;

Bartalini, P ;

Basile, M ;

Battiston, R ;

Bay, A ;

Becattini, F ;

Becker, U ;

Behner, F ;

Berdugo, J ;

Berges, P ;

Bertucci, B ;

Betev, BL ;

Bhattacharya, S ;

Biasini, M ;

Biland, A ;

Blaising, JJ ;

Blyth, SC ;

Bobbink, GJ ;

Böhm, A ;

Boldizsar, L ;

Borgia, B ;

Bourilkov, D ;

Bourquin, M ;

Braccini, S .

PHYSICS LETTERS B, 1999, 453 (1-2) :94-106

[7] Measurement of J/ψ and ψ(2S) polarization in p(p)over-bar collisions at √s=1.8 TeV [J].

Affolder, T ;

Akimoto, H ;

Akopian, A ;

Albrow, MG ;

Amaral, P ;

Amendolia, SR ;

Amidei, D ;

Anikeev, K ;

Antos, J ;

Apollinari, G ;

Arisawa, T ;

Asakawa, T ;

Ashmanskas, W ;

Atac, M ;

Azfar, F ;

Azzi-Bacchetta, P ;

Bacchetta, N ;

Bailey, MW ;

Bailey, S ;

de Barbaro, P ;

Barbaro-Galtieri, A ;

Barnes, VE ;

Barnett, BA ;

Barone, M ;

Bauer, G ;

Bedeschi, F ;

Belforte, S ;

Bellettini, G ;

Bellinger, J ;

Benjamin, D ;

Bensinger, J ;

Beretvas, A ;

Berge, JP ;

Berryhill, J ;

Bevensee, B ;

Bhatti, A ;

Binkley, M ;

Bisello, D ;

Blair, RE ;

Blocker, C ;

Bloom, K ;

Blumenfeld, B ;

Blusk, SR ;

Bocci, A ;

Bodek, A ;

Bokhari, W ;

Bolla, G ;

Bonushkin, Y ;

Bortoletto, D ;

Boudreau, J .

PHYSICAL REVIEW LETTERS, 2000, 85 (14) :2886-2891

[8] Prompt J/psi production in hadronic Z(0) decays [J].

Alexander, G ;

Allison, J ;

Altekamp, N ;

Ametewee, K ;

Anderson, KJ ;

Anderson, S ;

Arcelli, S ;

Asai, S ;

Axen, D ;

Azuelos, G ;

Ball, AH ;

Barberio, E ;

Barlow, RJ ;

Bartoldus, R ;

Batley, JR ;

Beaudoin, G ;

Bechtluft, J ;

Beeston, C ;

Behnke, T ;

Bell, AN ;

Bell, KW ;

Bella, G ;

Bentvelsen, S ;

Berlich, P ;

Bethke, S ;

Biebel, O ;

Blobel, V ;

Bloodworth, IJ ;

Bloomer, JE ;

Bock, P ;

Bosch, HM ;

Boutemeur, M ;

Bouwens, BT ;

Braibant, S ;

Brown, RM ;

Burckhart, HJ ;

Burgard, C ;

Burgin, R ;

Capiluppi, P ;

Carnegie, RK ;

Carter, AA ;

Carter, JR ;

Chang, CY ;

Charlesworth, C ;

Charlton, DG ;

Chrisman, D ;

Chu, SL ;

Clarke, PEL ;

Cohen, I ;

Conboy, JE .

PHYSICS LETTERS B, 1996, 384 (1-4) :343-352

[9]

[Anonymous], 2009, PHYS REV

[10] Hadroproduction of J/ψ and Γ in association with a heavy-quark pair [J].

Artoisenet, P. ;

Lansberg, J. P. ;

Maltoni, F. .

PHYSICS LETTERS B, 2007, 653 (01) :60-66

← 1 2 3 4 →