---
# System prepended metadata

title: 'Physics Performance Meeting, 25.02.2021, 01:00 AM JST'

---

# Physics Performance Meeting, 25.02.2021, 01:00 AM JST

Slides: https://indico.belle2.org/event/3451/

## Photon energy bias module (Nataliia Kovalchuk)
 * Module to correct remaining sub-percent differences of cluster energies wrt to MC is ready
 * Test payload with f(E) corrections ready as local database (see https://agira.desy.de/browse/BII-7629)


#### Questions

* Chris: What about clusterE?
 
  > A: This is not changed, only particle quantities are modified.
  
* Chris: Can we add more theta and energy windows?
  > A: Yes, whatever we want, this is very flexible.

* Comment Torben: What about uncertainties of the photon energy? Please make sure that this is correctly documented.

* Angelo: Does TreeFitter et al. use the corrected energy?
  > A (Frank): I will check.

* Comment Angelo: This is a correction relative to MC, ultimately the absolute energy scale must be correct.

## ICHEP readiness
 * Details on the corrections and systematics for Moriond can be found on the conference readiness page (https://confluence.desy.de/display/BI/Conference+readiness)


## Hadron ID (Angelo Di Canto)
 * For Moriond, K and pi ID corrections are provided in the same format as for ICHEP
 * generally data/MC for release-05 is improving for ARICH and CDC, mixed results for TOP

## Tracking (Petar Rados)
 * Aim to converge on updated K0s recommendations for Moriond by the tracking meeting on Friday.
     * With the same B+→ɸ[K*+→K0sπ+] sample and selections used for ICHEP, the overall systematic uncertainty for Moriond is expected to be ~half the size.

## Neutrals (Savino Longo)
 * Timing recommendations established which should improve stability against beam backgrounds (more details https://confluence.desy.de/display/BI/Photon+timing+selection+recommendations)

