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Search for prompt production of pentaquarks in charm hadron final states

https://doi.org/10.1103/PhysRevD.110.032001

Aaij, R; Abdelmotteleb, A_S W; Abellan_Beteta, C; Abudinén, F; Ackernley, T; Adeva, B; Adinolfi, M; Adlarson, P; Afsharnia, H; Agapopoulou, C; et al (August 2024, Physical Review D)

A search for hidden-charm pentaquark states decaying to a range of $Σ_{c} \bar{D}$ and $Λ_{c}^{+} \bar{D}$ final states, as well as doubly charmed pentaquark states to $Σ_{c} D$ and $Λ_{c}^{+} D$ , is made using samples of proton-proton collision data corresponding to an integrated luminosity of $5.7 {fb}^{- 1}$ recorded by the LHCb detector at $\sqrt{s} = 13 TeV$ . Since no significant signals are found, upper limits are set on the pentaquark yields relative to that of the $Λ_{c}^{+}$ baryon in the $Λ_{c}^{+} \to p K^{-} π^{+}$ decay mode. The known pentaquark states are also investigated, and their signal yields are found to be consistent with zero in all cases. © 2024 CERN, for the LHCb Collaboration2024CERN
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Free, publicly-accessible full text available August 1, 2025
Measurement of the Ratios of Branching Fractions $R (D^{*})$ and $R (D^{0})$

https://doi.org/10.1103/PhysRevLett.131.111802

Aaij, R; Abdelmotteleb, A_S W; Abellan_Beteta, C; Abudinén, F; Ackernley, T; Adeva, B; Adinolfi, M; Adlarson, P; Afsharnia, H; Agapopoulou, C; et al (September 2023, Physical Review Letters)
Garisto, R (Ed.)
The ratios of branching fractions R(D*)= B(B0 --> D*+tau- nu(bar))/ B(B0--> D*+mu- nu(bar)) and R(D)= B(B0 --> D0tau- nu(bar))/ B(B0 --> D0mu- nu(bar)) are measured, assuming isospin symmetry, using a sample of proton-proton collision data corresponding to 3.0 fb−1 of integrated luminosity recorded by the LHCb experiment during 2011 and 2012. The tau lepton is identified in the decay mode τ− → μ−ντν¯μ. The measured values are R*D*)= 0.281+/- 0.018+/- 0.024 and R(D0)=0.441+/- 0.060+/- 0.066, where the first uncertainty is statistical and the second is systematic. The correlation between these measurements is ρ= −0.43. The results are consistent with the current average of these quantities and are at a combined 1.9 standard deviations from the predictions based on lepton flavor universality in the standard model
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Measurement of the Prompt $D^{0}$ Nuclear Modification Factor in $p − Pb$ Collisions at $\sqrt{s_{N N}} = 8.16 TeV$

https://doi.org/10.1103/PhysRevLett.131.102301

Aaij, R.; Abdelmotteleb, A. S. W.; Abellan Beteta, C.; Abudinén, F.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Afsharnia, H.; Agapopoulou, C.; Aidala, C. A.; et al (September 2023, Physical Review Letters)

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Observation of a Resonant Structure near the $D_{s}^{+} D_{s}^{-}$ Threshold in the $B^{+} \to D_{s}^{+} D_{s}^{-} K^{+}$ Decay

https://doi.org/10.1103/PhysRevLett.131.071901

Aaij, R.; Abdelmotteleb, A. S. W.; Abellan Beteta, C.; Abudinén, F.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Afsharnia, H.; Agapopoulou, C.; Aidala, C. A.; et al (August 2023, Physical Review Letters)

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First observation of the $B^{+} \to D_{s}^{+} D_{s}^{-} K^{+}$ decay

https://doi.org/10.1103/PhysRevD.108.034012

Aaij, R.; Abdelmotteleb, A. S. W.; Abellan Beteta, C.; Abudinén, F.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Afsharnia, H.; Agapopoulou, C.; Aidala, C. A.; et al (August 2023, Physical Review D)

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Measurement of the Branching Fractions $B (B^{0} \to p \bar{p} p \bar{p})$ and $B (B_{s}^{0} \to p \bar{p} p \bar{p})$

https://doi.org/10.1103/PhysRevLett.131.091901

Aaij, R.; Abdelmotteleb, A. S. W.; Abellan Beteta, C.; Abudinén, F.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Adlarson, P.; Afsharnia, H.; Agapopoulou, C.; et al (August 2023, Physical Review Letters)

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Multidifferential study of identified charged hadron distributions in $Z$ -tagged jets in proton-proton collisions at $\sqrt{s} = 13 TeV$

https://doi.org/10.1103/PhysRevD.108.L031103

Aaij, R.; Abdelmotteleb, A. S. W.; Abellan Beteta, C.; Abudinén, F.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Afsharnia, H.; Agapopoulou, C.; Aidala, C. A.; et al (August 2023, Physical Review D)

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Nuclear Modification Factor of Neutral Pions in the Forward and Backward Regions in $p − Pb$ Collisions

https://doi.org/10.1103/PhysRevLett.131.042302

Aaij, R.; Abdelmotteleb, A. S. W.; Abellan Beteta, C.; Abudinén, F.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Afsharnia, H.; Agapopoulou, C.; Aidala, C. A.; et al (July 2023, Physical Review Letters)

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First Observation of a Doubly Charged Tetraquark and Its Neutral Partner

https://doi.org/10.1103/PhysRevLett.131.041902

Aaij, R.; Abdelmotteleb, A. S. W.; Abellan Beteta, C.; Abudinén, F.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Adlarson, P.; Afsharnia, H.; Agapopoulou, C.; et al (July 2023, Physical Review Letters)

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Amplitude analysis of $B^{0} \to {\bar{D}}^{0} D_{s}^{+} π^{-}$ and $B^{+} \to D^{-} D_{s}^{+} π^{+}$ decays

https://doi.org/10.1103/PhysRevD.108.012017

Aaij, R.; Abdelmotteleb, A. S. W.; Abellan Beteta, C.; Abudinén, F.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Adlarson, P.; Afsharnia, H.; Agapopoulou, C.; et al (July 2023, Physical Review D)

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