Aaij, R., et al. "Fraction of <math display='inline'> <mrow> <msub> <mrow> <mi>χ</mi> </mrow> <mrow> <mi>c</mi> </mrow> </msub> </mrow> </math> Decays in Prompt <math display='inline'> <mi>J</mi> <mo>/</mo> <mi>ψ</mi> </math> Production Measured in <math display='inline'> <mrow> <mi>p</mi> <mi>Pb</mi> </mrow> </math> Collisions at <math display='inline'> <mrow> <msqrt> <mrow> <msub> <mrow> <mi>s</mi> </mrow> <mrow> <mi>NN</mi> </mrow> </msub> </mrow> </msqrt> <mo>=</mo> <mn>8.16</mn> <mtext> </mtext> <mtext> </mtext> <mi>TeV</mi> </mrow> </math>." Physical Review Letters, vol. 132, no. 10, Mar. 2024. https://doi.org/10.1103/PhysRevLett.132.102302
Aaij, R., Abdelmotteleb, A. S. W., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adeva, B., Adinolfi, M., Adlarson, P., Agapopoulou, C., Aidala, C. A., Ajaltouni, Z., Akar, S., Akiba, K., Albicocco, P., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., ... Zunica, G. (2024). Fraction of <math display='inline'> <mrow> <msub> <mrow> <mi>χ</mi> </mrow> <mrow> <mi>c</mi> </mrow> </msub> </mrow> </math> Decays in Prompt <math display='inline'> <mi>J</mi> <mo>/</mo> <mi>ψ</mi> </math> Production Measured in <math display='inline'> <mrow> <mi>p</mi> <mi>Pb</mi> </mrow> </math> Collisions at <math display='inline'> <mrow> <msqrt> <mrow> <msub> <mrow> <mi>s</mi> </mrow> <mrow> <mi>NN</mi> </mrow> </msub> </mrow> </msqrt> <mo>=</mo> <mn>8.16</mn> <mtext> </mtext> <mtext> </mtext> <mi>TeV</mi> </mrow> </math>. Physical Review Letters, 132(10). https://doi.org/10.1103/PhysRevLett.132.102302
Aaij, R., Abdelmotteleb, A. S. W., Abellan Beteta, C., et al., "Fraction of <math display='inline'> <mrow> <msub> <mrow> <mi>χ</mi> </mrow> <mrow> <mi>c</mi> </mrow> </msub> </mrow> </math> Decays in Prompt <math display='inline'> <mi>J</mi> <mo>/</mo> <mi>ψ</mi> </math> Production Measured in <math display='inline'> <mrow> <mi>p</mi> <mi>Pb</mi> </mrow> </math> Collisions at <math display='inline'> <mrow> <msqrt> <mrow> <msub> <mrow> <mi>s</mi> </mrow> <mrow> <mi>NN</mi> </mrow> </msub> </mrow> </msqrt> <mo>=</mo> <mn>8.16</mn> <mtext> </mtext> <mtext> </mtext> <mi>TeV</mi> </mrow> </math>," Physical Review Letters 132, no. 10 (2024), https://doi.org/10.1103/PhysRevLett.132.102302
@article{osti_2474405,
author = {Aaij, R. and Abdelmotteleb, A. S. W. and Abellan Beteta, C. and Abudinén, F. and Ackernley, T. and Adeva, B. and Adinolfi, M. and Adlarson, P. and Agapopoulou, C. and Aidala, C. A. and others},
title = {Fraction of <math display='inline'> <mrow> <msub> <mrow> <mi>χ</mi> </mrow> <mrow> <mi>c</mi> </mrow> </msub> </mrow> </math> Decays in Prompt <math display='inline'> <mi>J</mi> <mo>/</mo> <mi>ψ</mi> </math> Production Measured in <math display='inline'> <mrow> <mi>p</mi> <mi>Pb</mi> </mrow> </math> Collisions at <math display='inline'> <mrow> <msqrt> <mrow> <msub> <mrow> <mi>s</mi> </mrow> <mrow> <mi>NN</mi> </mrow> </msub> </mrow> </msqrt> <mo>=</mo> <mn>8.16</mn> <mtext> </mtext> <mtext> </mtext> <mi>TeV</mi> </mrow> </math>},
annote = { The fraction of χ c 1 and χ c 2 decays in the prompt J / ψ yield, F χ c → J / ψ = σ χ c → J / ψ / σ J / ψ , is measured by the LHCb detector in p Pb collisions at s NN = 8.16 TeV . The study covers the forward ( 1.5 y * 4.0 ) and backward ( − 5.0 y * − 2.5 ) rapidity regions, where y * is the J / ψ rapidity in the nucleon-nucleon center-of-mass system. Forward and backward rapidity samples correspond to integrated luminosities of 13.6 ± 0.3 and 20.8 ± 0.5 nb − 1 , respectively. The result is presented as a function of the J / ψ transverse momentum p T , J / ψ in the range 1 p T , J / ψ 20 GeV / c . The F χ c → J / ψ fraction at forward rapidity is compatible with the LHCb measurement performed in p p collisions at s = 7 TeV , whereas the result at backward rapidity is 2.4 σ larger than in the forward region for 1 p T , J / ψ 3 GeV / c . The increase of F χ c → J / ψ at low p T , J / ψ at backward rapidity is compatible with the suppression of the ψ ( 2 S ) contribution to the prompt J / ψ yield. The lack of in-medium dissociation of χ c states observed in this study sets an upper limit of 180 MeV on the free energy available in these p Pb collisions to dissociate or inhibit charmonium state formation. © 2024 CERN, for the LHCb Collaboration 2024 CERN },
doi = {10.1103/PhysRevLett.132.102302},
url = {https://www.osti.gov/biblio/2474405},
journal = {Physical Review Letters},
issn = {ISSN PRLTAO},
number = {10},
volume = {132},
place = {United States},
publisher = {American Physical Society},
year = {2024},
month = {03}}