Intrinsic charm and $D^+D^-$ asymmetry produced in proton-proton collisions
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arXiv
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| Hauptverfasser: | , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866912202003316736 |
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| author | Lykasov, G. I. Sorokovikov, M. N. Brodsky, S. J. |
| author_facet | Lykasov, G. I. Sorokovikov, M. N. Brodsky, S. J. |
| contents | We investigate the contribution of the charm-anticharrm ($c{\bar c}$) asymmetry of the proton eigenstate obtained from QCD lattice gauge to the asymmetry of $D^+D^-$ and $D^0{\bar D}^0$ mesons produced in $pp$ collisions at large Feynman variables $x$. It is shown that an important tool for the establishing the intrinsic charm (IC) content of the proton is the charm hadron-antihadron asymmetry formed in $pp$ collisions. Predictions for the asymmetry as function of $x$ for different IC probabilities are presented. We show that the interference of the intrinsic $|uud c{\bar c}>$ Fock state with the standard contribution from the PQCD evolution leads to a large $D^+D^-$ asymmetry at large Feynman $x$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_02507 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Intrinsic charm and $D^+D^-$ asymmetry produced in proton-proton collisions Lykasov, G. I. Sorokovikov, M. N. Brodsky, S. J. High Energy Physics - Phenomenology We investigate the contribution of the charm-anticharrm ($c{\bar c}$) asymmetry of the proton eigenstate obtained from QCD lattice gauge to the asymmetry of $D^+D^-$ and $D^0{\bar D}^0$ mesons produced in $pp$ collisions at large Feynman variables $x$. It is shown that an important tool for the establishing the intrinsic charm (IC) content of the proton is the charm hadron-antihadron asymmetry formed in $pp$ collisions. Predictions for the asymmetry as function of $x$ for different IC probabilities are presented. We show that the interference of the intrinsic $|uud c{\bar c}>$ Fock state with the standard contribution from the PQCD evolution leads to a large $D^+D^-$ asymmetry at large Feynman $x$. |
| title | Intrinsic charm and $D^+D^-$ asymmetry produced in proton-proton collisions |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2501.02507 |