The p-p-$\Lambda$ correlation function without the genuine 3-body interaction can be estimated using the cumulant method, (p-p)-$\Lambda$ and p-(p-$\Lambda$) correlation functions. The green points show the result obtained using the measured correlation functions. The grey band shows the result obtained using the projected correlation functions.
Run HM pp 13 TeV data
AOD pass1
LHC16d_pass1
LHC16e_pass1
LHC16g_pass1
LHC16h_pass1
LHC16i_pass1
LHC16j_pass1
LHC16k_pass2
LHC16l_pass2
LHC16o_pass1
LHC16p_pass1
LHC17c_pass1
LHC17e_pass1
LHC17f_pass1
LHC17h_pass1
LHC17i_pass1
LHC17j_pass1
LHC17k_pass1
LHC17l_pass1
LHC17m_pass1
LHC17o_pass1
LHC17r_pass1
LHC18b_pass1
LHC18d_pass1
LHC18e_pass1
LHC18f_pass1
LHC18g_pass1
LHC18h_pass1
LHC18i_pass1
LHC18j_pass1
LHC18k_pass1
LHC18l_pass1
LHC18m_pass1_withTRDtracking
LHC18n_pass1
LHC18o_pass1
LHC18p_pass1
Event Cuts
- AliEventCuts
- kHighMultV0 trigger
Track Cuts Proton candidate
- TPC only tracks
- NCrossedrows/NFindableCluster> 0.83
- NCrossedRows> 70
- NTPCcluster> 80
- Reject tracks with shared cluster
- |nSigmaTPC| < 3 for P < 0.75 GeV/c
- sqrt(nSigmaTPC2+ nSigmaTOF2) < 3
- 0.5 < pT < 4.05 GeV/c
- |eta| < 0.8
- |DCAxy| < 0.1 cm && |DCAz| < 0.2 cm
Track Cuts Lambda candidate
- offline V0 finder
- V0 pT> 0.3 GeV/c
- V0 decay vertex |x_i| < 100 cm, i=1,2,3
- Transverse radius 0.2 cm < rxy < 100 cm
- Lambda selection width 8 MeV/c²
- DCA of the daughter tracks at the decay vertex < 1.5 sigma
- Pointing angle cos(alpha) > 0.99
- NTPCcluster> 70
- |eta| < 0.8 for daughter tracks
- One of the daughter tracks are required to have a hit in either the ITS SPD, ITS SSD or the TOF
- DCA of the daughter track to the PV > 0.05 cm
- |nSigmaTPC| < 5
More details in analysis note: https://alice-notes.web.cern.ch/node/1153