{"action":"created","issue":{"url":"https://api.github.com/repos/cms-sw/cmssw/issues/17067","repository_url":"https://api.github.com/repos/cms-sw/cmssw","labels_url":"https://api.github.com/repos/cms-sw/cmssw/issues/17067/labels{/name}","comments_url":"https://api.github.com/repos/cms-sw/cmssw/issues/17067/comments","events_url":"https://api.github.com/repos/cms-sw/cmssw/issues/17067/events","html_url":"https://github.com/cms-sw/cmssw/pull/17067","id":196359134,"number":17067,"title":"Fix PUPPI lowPUCorr config 90X","user":{"login":"ahinzmann","id":4518137,"avatar_url":"https://avatars.githubusercontent.com/u/4518137?v=3","gravatar_id":"","url":"https://api.github.com/users/ahinzmann","html_url":"https://github.com/ahinzmann","followers_url":"https://api.github.com/users/ahinzmann/followers","following_url":"https://api.github.com/users/ahinzmann/following{/other_user}","gists_url":"https://api.github.com/users/ahinzmann/gists{/gist_id}","starred_url":"https://api.github.com/users/ahinzmann/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/ahinzmann/subscriptions","organizations_url":"https://api.github.com/users/ahinzmann/orgs","repos_url":"https://api.github.com/users/ahinzmann/repos","events_url":"https://api.github.com/users/ahinzmann/events{/privacy}","received_events_url":"https://api.github.com/users/ahinzmann/received_events","type":"User","site_admin":false},"labels":[{"id":52881179,"url":"https://api.github.com/repos/cms-sw/cmssw/labels/analysis-pending","name":"analysis-pending","color":"fbca04","default":false},{"id":88645479,"url":"https://api.github.com/repos/cms-sw/cmssw/labels/comparison-available","name":"comparison-available","color":"009800","default":false},{"id":56953091,"url":"https://api.github.com/repos/cms-sw/cmssw/labels/orp-pending","name":"orp-pending","color":"fbca04","default":false},{"id":53167770,"url":"https://api.github.com/repos/cms-sw/cmssw/labels/pending-signatures","name":"pending-signatures","color":"eb6420","default":false},{"id":52820010,"url":"https://api.github.com/repos/cms-sw/cmssw/labels/reconstruction-pending","name":"reconstruction-pending","color":"fbca04","default":false},{"id":56131195,"url":"https://api.github.com/repos/cms-sw/cmssw/labels/tests-approved","name":"tests-approved","color":"009800","default":false}],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":{"url":"https://api.github.com/repos/cms-sw/cmssw/milestones/64","html_url":"https://github.com/cms-sw/cmssw/milestone/64","labels_url":"https://api.github.com/repos/cms-sw/cmssw/milestones/64/labels","id":2138657,"number":64,"title":"Next CMSSW_9_0_X","description":null,"creator":{"login":"smuzaffar","id":4115138,"avatar_url":"https://avatars.githubusercontent.com/u/4115138?v=3","gravatar_id":"","url":"https://api.github.com/users/smuzaffar","html_url":"https://github.com/smuzaffar","followers_url":"https://api.github.com/users/smuzaffar/followers","following_url":"https://api.github.com/users/smuzaffar/following{/other_user}","gists_url":"https://api.github.com/users/smuzaffar/gists{/gist_id}","starred_url":"https://api.github.com/users/smuzaffar/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/smuzaffar/subscriptions","organizations_url":"https://api.github.com/users/smuzaffar/orgs","repos_url":"https://api.github.com/users/smuzaffar/repos","events_url":"https://api.github.com/users/smuzaffar/events{/privacy}","received_events_url":"https://api.github.com/users/smuzaffar/received_events","type":"User","site_admin":false},"open_issues":64,"closed_issues":295,"state":"open","created_at":"2016-11-16T08:55:18Z","updated_at":"2016-12-29T03:16:36Z","due_on":null,"closed_at":null},"comments":8,"created_at":"2016-12-19T08:46:19Z","updated_at":"2016-12-29T07:33:29Z","closed_at":null,"pull_request":{"url":"https://api.github.com/repos/cms-sw/cmssw/pulls/17067","html_url":"https://github.com/cms-sw/cmssw/pull/17067","diff_url":"https://github.com/cms-sw/cmssw/pull/17067.diff","patch_url":"https://github.com/cms-sw/cmssw/pull/17067.patch"},"body":"Re-enable PUPPI lowPUCorr, which was unintentionally disabled in #15562.\r\nWith lowPUCorr disabled, we get a 1-5% worsening in jet response, though the impact on jet resolution is minor, as shown on slide 6:\r\nhttps://indico.cern.ch/event/587258/contributions/2366495/attachments/1368938/2117761/satoshi_updatedAfterTheMeeting.pdf\r\nWhat is labeled v10 is in the CMSSW_8_0_>=20 and CMSSW_8_1_X and CMSSW_9_0_X releases at the moment.\r\nWhat is labeled v10 LowPUCorr is in CMSSW_8_0_<20 and in this PR.\r\nFor CMSSW_8_0_>=20, we have corrected for this response drop with the jet energy corrections, however, we would like to fix this for CMSSW>=8_1_X releases, even though the effect on resolution is minor.\r\n\r\nThe impact of this PR on jet and MET response and resolution has been validated.\r\n\r\nThis PR changes the MINIAOD PUPPI jet+MET collection, no changes to RECO/AOD event content."},"comment":{"url":"https://api.github.com/repos/cms-sw/cmssw/issues/comments/269592590","html_url":"https://github.com/cms-sw/cmssw/pull/17067#issuecomment-269592590","issue_url":"https://api.github.com/repos/cms-sw/cmssw/issues/17067","id":269592590,"user":{"login":"slava77","id":4676718,"avatar_url":"https://avatars.githubusercontent.com/u/4676718?v=3","gravatar_id":"","url":"https://api.github.com/users/slava77","html_url":"https://github.com/slava77","followers_url":"https://api.github.com/users/slava77/followers","following_url":"https://api.github.com/users/slava77/following{/other_user}","gists_url":"https://api.github.com/users/slava77/gists{/gist_id}","starred_url":"https://api.github.com/users/slava77/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/slava77/subscriptions","organizations_url":"https://api.github.com/users/slava77/orgs","repos_url":"https://api.github.com/users/slava77/repos","events_url":"https://api.github.com/users/slava77/events{/privacy}","received_events_url":"https://api.github.com/users/slava77/received_events","type":"User","site_admin":false},"created_at":"2016-12-29T07:33:29Z","updated_at":"2016-12-29T07:33:29Z","body":"@ahinzmann \r\nis this rather large change in the photon component at low PU expected?\r\n\r\nHGG no PU\r\n![all_sign816-patvsorig-gcc530-pat_h125gg13tevwf1332p0c_log10patjets_slimmedjetspuppi__pat_obj_et](https://cloud.githubusercontent.com/assets/4676718/21538819/c811e3be-cd55-11e6-961f-c16db9e13951.png)\r\n\r\nIt seems to be moving in the right direction for the signal, but it's unclear if it's accidental and can get even [worse] more significant for backgrounds with similar topologies.\r\n"}}
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