Coalescence paper meeting

Wednesday 1 Jun 2022, 11:29 → 12:30 Europe/Rome

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Francesca Bellini (Istituto Nazionale di Fisica Nucleare), Laura Fabbietti

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Minutes:

Sushanta:

• Best fit for HM multiplicity distribution for the CR 2 Mode of pythia is Nch(V0M)=135 (99.6% loss)
• close to the 127 from EPOS
• HM pp data @13TeV are reproduced very poorly with this Mode and HM trigger (~100% overshoot at lot pT)
• With Monash tune the best fit Nch(V0M)=157 (99.995% loss)
• HM pp data @13TeV are reproduced almost perfectly
• From now on use Monash with HM tune for coalescence studies (requires much more statistics to be produced, but its fast to do)
• To do: Get the multiplicity distributions public, before ICHEP so we can use the figures there and for the paper (High priority!)

Luca:

• EPOS productions at Virgo (GSI) cluster are progressing well
• 300M events by the end of the month
• locally we already have 100M (ROOT 5) and 30M that should be additionally finished by the end of the month 
• LRZ production is slow with only very few partitions accessible for us and a very limited number of Jobs allowed to be submitted
• However Ante managed to start jobs which create 100s of subjobs. This way more jobs can be run on the LRZ farm
• Statistics ~2M per day which would add up to ~50M by the end of the month
• Ask Ludwig Maier together with Ante (and Laura in CC) for a temporary increase of partitions

Bhawani:

• The 10% approximation (using D(q)*exp(-iqr) instead of D(q,r)) is not valid for pp when compared to the exact solutions by Kachelrieß
• No way around doing the actual calculation which might be difficult/impossible as pointed out in literature

Maxi:

• Started working on the new source model
• Implement the measured core source size with a homogeneous increase of the source keeping the angle between the distance vector and the momenta the same
• Move the primordials and add the decays afterwards
• measure the distance after propagation to equal times
• Paper-review by Shao et al.:
  • Coalescence model seems to have some problems
  • They only use the output of the AMPT model without any corrections to measurements (most importantly the source size) 

 

 

 

 

 

11:29 → 11:30 Google doc

11:30 → 11:40 Progress report - Maxi

Speaker: Maxi Horst

CPM-NewSourceModel.pdf

11:40 → 11:50 Progress report - Sushanta

Speaker: Sushanta Tripathy (INFN, Bologna (IT))

Status_Sushanta-1June2022.pdf

11:50 → 12:00 Progress report - Luca

Speakers: Luca Barioglio (Technische Universität München), Luca Barioglio

CAN_20220601.pdf

12:00 → 12:10 Progress report - Chiara

Speaker: Chiara Pinto

12:10 → 12:25 Progress report - Francesca

Speaker: Francesca Bellini (Istituto Nazionale di Fisica Nucleare)