Abstract
In the present paper, we make a detailed study on the doubly heavy baryon photoproduction in the future e + e − International Linear Collider (ILC). The baryons Ξ cc , Ξ bc , and Ξ bb are produced via the channel \( \gamma \gamma \to {\Xi}_{QQ\prime }+\overline{Q}^{\prime }+\overline{Q} \), where Q and Q′ stand for heavy c or b quark, respectively. As for the Ξ QQ ′-baryon production, it shall first generate a (QQ′)[n]-diquark and then form the final baryon via fragmentation, where [n] stands for the color- and spin- configurations for the (QQ′)-diquark states. According to the non-relativistic QCD theory, four diquark configurations shall provide sizable contributions to the baryon production, e.g., [n] equals \( {\left[{}^3{S}_1\right]}_{\overline{3}},\;{\left[{}^1{S}_0\right]}_6,\;{\left[{}^3{S}_1\right]}_6,\;\mathrm{or}\kern0.37em {\left[{}^1{S}_0\right]}_{\overline{3}} \), respectively. We adopt the improved helicity amplitude approach for the hard scattering amplitude to improve the calculation efficiency. Total and differential cross sections of those channels, as well as the theoretical uncertainties, are presented. We show that sizable amounts of baryon events can be generated at the ILC, i.e., about 2.0 × 106 Ξ cc , 2.2 × 105 Ξ bc , as well as 3.0 × 103 Ξ bb events are to be generated in one operation year for \( \sqrt{S}=500 \) GeV and ℒ ≃ 1036 cm−2s−1.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
A.F. Falk, M.E. Luke, M.J. Savage and M.B. Wise, Heavy quark fragmentation to baryons containing two heavy quarks, Phys. Rev. D 49 (1994) 555 [hep-ph/9305315] [INSPIRE].
V.V. Kiselev, A.K. Likhoded and M.V. Shevlyagin, Double charmed baryon production at B factory, Phys. Lett. B 332 (1994) 411 [hep-ph/9408407] [INSPIRE].
S.P. Baranov, On the production of doubly flavored baryons in pp, ep and γγ collisions, Phys. Rev. D 54 (1996) 3228 [INSPIRE].
A.V. Berezhnoy, V.V. Kiselev, A.K. Likhoded and A.I. Onishchenko, Doubly charmed baryon production in hadronic experiments, Phys. Rev. D 57 (1998) 4385 [hep-ph/9710339] [INSPIRE].
J.P. Ma and Z.G. Si, Factorization approach for inclusive production of doubly heavy baryon, Phys. Lett. B 568 (2003) 135 [hep-ph/0305079] [INSPIRE].
S.-Y. Li, Z.-G. Si and Z.-J. Yang, Doubly heavy baryon production at γγ collider, Phys. Lett. B 648 (2007) 284 [hep-ph/0701212] [INSPIRE].
C.-H. Chang, C.-F. Qiao, J.-X. Wang and X.-G. Wu, Estimate of the hadronic production of the doubly charmed baryon Ξ cc under GM-VFN scheme, Phys. Rev. D 73 (2006) 094022 [hep-ph/0601032] [INSPIRE].
C.-H. Chang, J.-P. Ma, C.-F. Qiao and X.-G. Wu, Hadronic production of the doubly charmed baryon Ξ cc with intrinsic charm, J. Phys. G 34 (2007) 845 [hep-ph/0610205] [INSPIRE].
C.-H. Chang, J.-X. Wang and X.-G. Wu, GENXICC: A generator for hadronic production of the double heavy baryons Ξ cc , Ξ bc and Ξ bb , Comput. Phys. Commun. 177 (2007) 467 [hep-ph/0702054] [INSPIRE].
C.-H. Chang, J.-X. Wang and X.-G. Wu, GENXICC2.0: An Upgraded Version of the Generator for Hadronic Production of Double Heavy Baryons Ξ cc , Ξ bc and Ξ bb , Comput. Phys. Commun. 181 (2010) 1144 [arXiv:0910.4462] [INSPIRE].
J.-W. Zhang, X.-G. Wu, T. Zhong, Y. Yu and Z.-Y. Fang, Hadronic Production of the Doubly Heavy Baryon Ξ bc at LHC, Phys. Rev. D 83 (2011) 034026 [arXiv:1101.1130] [INSPIRE].
G. Chen, X.-G. Wu, J.-W. Zhang, H.-Y. Han and H.-B. Fu, Hadronic production of Ξ cc at a fixed-target experiment at the LHC, Phys. Rev. D 89 (2014) 074020 [arXiv:1401.6269] [INSPIRE].
J. Jiang, X.-G. Wu, Q.-L. Liao, X.-C. Zheng and Z.-Y. Fang, Doubly Heavy Baryon Production at A High Luminosity e + e − Collider, Phys. Rev. D 86 (2012) 054021 [arXiv:1208.3051] [INSPIRE].
J. Jiang, X.-G. Wu, S.-M. Wang, J.-W. Zhang and Z.-Y. Fang, A Further Study on the Doubly Heavy Baryon Production around the Z 0 Peak at A High Luminosity e + e − Collider, Phys. Rev. D 87 (2013) 054027 [arXiv:1302.0601] [INSPIRE].
SELEX collaboration, M. Mattson et al., First observation of the doubly charmed baryon Ξ + cc , Phys. Rev. Lett. 89 (2002) 112001 [hep-ex/0208014] [INSPIRE].
SELEX collaboration, A. Ocherashvili et al., Confirmation of the double charm baryon Ξ + cc (3520) via its decay to pD + K −, Phys. Lett. B 628 (2005) 18 [hep-ex/0406033] [INSPIRE].
V.V. Kiselev and A.K. Likhoded, Comment on ‘First observation of doubly charmed Ξ + cc ′, hep-ph/0208231 [INSPIRE].
LHCb collaboration, Implications of LHCb measurements and future prospects, Eur. Phys. J. C 73 (2013) 2373 [arXiv:1208.3355] [INSPIRE].
LHCb collaboration, Search for the doubly charmed baryon Ξ + cc , JHEP 12 (2013) 090 [arXiv:1310.2538] [INSPIRE].
Belle collaboration, Y. Kato et al., Search for doubly charmed baryons and study of charmed strange baryons at Belle, Phys. Rev. D 89 (2014) 052003 [arXiv:1312.1026] [INSPIRE].
G.T. Bodwin, E. Braaten and G.P. Lepage, Rigorous QCD analysis of inclusive annihilation and production of heavy quarkonium, Phys. Rev. D 51 (1995) 1125 [Erratum ibid. D 55 (1997) 5853] [hep-ph/9407339] [INSPIRE].
C.-H. Chang, C. Driouichi, P. Eerola and X.G. Wu, BCVEGPY: An event generator for hadronic production of the B c meson, Comput. Phys. Commun. 159 (2004) 192 [hep-ph/0309120] [INSPIRE].
E. Braaten, M. Kusunoki, Y. Jia and T. Mehen, Λ + c /Λ − c asymmetry in hadroproduction from heavy quark recombination, Phys. Rev. D 70 (2004) 054021 [hep-ph/0304280] [INSPIRE].
W.K. Lai and A.K. Leibovich, Λ + c /Λ − c and \( {\Lambda}_b^0/{\overline{\Lambda}}_b^0 \) production asymmetry at the LHC from heavy quark recombination, arXiv:1410.2091 [INSPIRE].
I.F. Ginzburg, G.L. Kotkin, V.G. Serbo and V.I. Telnov, Colliding γe and γγ Beams Based on the Single Pass Accelerators (of Vlepp Type), Nucl. Instrum. Meth. 205 (1983) 47 [INSPIRE].
V.I. Telnov, Problems of Obtaining γγ and γϵ Colliding Beams at Linear Colliders, Nucl. Instrum. Meth. A 294 (1990) 72 [INSPIRE].
C. Peterson, D. Schlatter, I. Schmitt and P.M. Zerwas, Scaling Violations in Inclusive e + e − Annihilation Spectra, Phys. Rev. D 27 (1983) 105 [INSPIRE].
V.G. Kartvelishvili, A.K. Likhoded and V.A. Petrov, On the Fragmentation Functions of Heavy Quarks Into Hadrons, Phys. Lett. B 78 (1978) 615 [INSPIRE].
M.G. Bowler, e + e − Production of Heavy Quarks in the String Model, Z. Phys. C 11 (1981) 169 [INSPIRE].
P.D.B. Collins and T.P. Spiller, The Fragmentation of Heavy Quarks, J. Phys. G 11 (1985) 1289 [INSPIRE].
G. Colangelo and P. Nason, A Theoretical study of the c and b fragmentation function from e + e − annihilation, Phys. Lett. B 285 (1992) 167 [INSPIRE].
E. Braaten, K.-m. Cheung, S. Fleming and T.C. Yuan, Perturbative QCD fragmentation functions as a model for heavy quark fragmentation, Phys. Rev. D 51 (1995) 4819 [hep-ph/9409316] [INSPIRE].
P. Masjuan, γ * γ → π 0 transition form factor at low-energies from a model-independent approach, Phys. Rev. D 86 (2012) 094021 [arXiv:1206.2549] [INSPIRE].
S. Fleming, A.K. Leibovich, T. Mehen and I.Z. Rothstein, Anomalous dimensions of the double parton fragmentation functions, Phys. Rev. D 87 (2013) 074022 [arXiv:1301.3822] [INSPIRE].
Y.-Q. Ma, J.-W. Qiu and H. Zhang, Heavy quarkonium fragmentation functions from a heavy quark pair. I. S wave, Phys. Rev. D 89 (2014) 094029 [arXiv:1311.7078] [INSPIRE].
Y.-Q. Ma, J.-W. Qiu and H. Zhang, Heavy quarkonium fragmentation functions from a heavy quark pair. II. P wave, Phys. Rev. D 89 (2014) 094030 [arXiv:1401.0524] [INSPIRE].
Z.-B. Kang, Y.-Q. Ma, J.-W. Qiu and G. Sterman, Heavy Quarkonium Production at Collider Energies: Factorization and Evolution, Phys. Rev. D 90 (2014) 034006 [arXiv:1401.0923] [INSPIRE].
Y.-Q. Ma, J.-W. Qiu, G. Sterman and H. Zhang, Factorized power expansion for high-p T heavy quarkonium production, Phys. Rev. Lett. 113 (2014) 142002 [arXiv:1407.0383] [INSPIRE].
A.V. Berezhnoy, V.V. Kiselev, A.K. Likhoded and A.I. Onishchenko, Doubly charmed baryon production in hadronic experiments, Phys. Rev. D 57 (1998) 4385 [hep-ph/9710339] [INSPIRE].
SLD collaboration, K. Abe et al., Measurement of the b quark fragmentation function in Z 0 decays, Phys. Rev. D 65 (2002) 092006 [Erratum ibid. D 66 (2002) 079905] [hep-ex/0202031] [INSPIRE].
DELPHI collaboration, J. Abdallah et al., A measurement of the branching fractions of the b quark into charged and neutral b hadrons, Phys. Lett. B 576 (2003) 29 [hep-ex/0311005] [INSPIRE].
SLD collaboration, K. Abe et al., Measurements of R b with impact parameters and displaced vertices, Phys. Rev. D 53 (1996) 1023 [INSPIRE].
ALEPH collaboration, A. Heister et al., Study of the fragmentation of b quarks into B mesons at the Z peak, Phys. Lett. B 512 (2001) 30 [hep-ex/0106051] [INSPIRE].
OPAL collaboration, G. Abbiendi et al., Inclusive analysis of the b quark fragmentation function in Z decays at LEP, Eur. Phys. J. C 29 (2003) 463 [hep-ex/0210031] [INSPIRE].
C. Yu-qi and W. Su-zhi, Production of four-quark states with double heavy quarks at LHC, Phys. Lett. B 705 (2011) 93 [arXiv:1101.4568] [INSPIRE].
G. Chen, X.-G. Wu, H.-B. Fu, H.-Y. Han and Z. Sun, Photoproduction of the heavy quarkonium at the ILC, Phys. Rev. D 90 (2014) 034004 [arXiv:1407.3650] [INSPIRE].
A. Petrelli, M. Cacciari, M. Greco, F. Maltoni and M.L. Mangano, NLO production and decay of quarkonium, Nucl. Phys. B 514 (1998) 245 [hep-ph/9707223] [INSPIRE].
S.-Q. Wang, X.-G. Wu, X.-C. Zheng, J.-M. Shen and Q.-L. Zhang, J/ψ + χ cJ Production at the B Factories under the Principle of Maximum Conformality, Nucl. Phys. B 876 (2013) 731 [arXiv:1301.2992] [INSPIRE].
X.-C. Zheng, X.-G. Wu, S.-Q. Wang, J.-M. Shen and Q.-L. Zhang, Reanalysis of the BFKL Pomeron at the next-to-leading logarithmic accuracy, JHEP 10 (2013) 117 [arXiv:1308.2381] [INSPIRE].
T. Sjöstrand, S. Mrenna and P.Z. Skands, PYTHIA 6.4 Physics and Manual, JHEP 05 (2006) 026 [hep-ph/0603175] [INSPIRE].
Open Access
This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.
Author information
Authors and Affiliations
Corresponding author
Additional information
ArXiv ePrint: 1408.4615
Rights and permissions
Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0), which permits use, duplication, adaptation, distribution, and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
About this article
Cite this article
Chen, G., Wu, XG., Sun, Z. et al. Photoproduction of doubly heavy baryon at the ILC. J. High Energ. Phys. 2014, 18 (2014). https://doi.org/10.1007/JHEP12(2014)018
Received:
Revised:
Accepted:
Published:
DOI: https://doi.org/10.1007/JHEP12(2014)018