363861 20260319124959.0 10.17182/HEPDATA.152623.V1 doi GSI-2026-00067 English ALICE Collaboration P:(DE-HGF)0 0 Corresponding author Common femtoscopic hadron-emission source in pp collisions at the LHC 2024 MISC BibTeX Dataset dataset dataset PUB:(DE-HGF)32 1769415980_429472 PUB:(DE-HGF) Chart or Table 26 EndNote Dataset DataCite DATA_SET ORCID ResearchData DINI Journal Article GSI record: GSI-2026-00065 The femtoscopic study of pairs of identical pions is particularly suited to investigate the effective source function of particle emission, due to the resulting Bose--Einstein correlation signal. In small collision systems at the LHC, pp in particular, the majority of the pions are produced in resonance decays, which significantly affect the profile and size of the source. In this work, we explicitly model this effect in order to extract the primordial source in pp collisions at $\sqrt{s}~=~13~$TeV from charged $\pi$$-$$\pi$ correlations measured by ALICE. We demonstrate that the assumption of a Gaussian primordial source is compatible with the data and that the effective source, resulting from modifications due to resonances, is approximately exponential, as found in previous measurements at the LHC. The universality of hadron emission in pp collisions is further investigated by applying the same methodology to characterize the primordial source of K$-$p pairs. The size of the primordial source is evaluated as a function of the transverse mass ($m_{\mathrm{T}}$) of the pairs, leading to the observation of a common scaling for both $\pi$$-$$\pi$ and K$-$p, suggesting a collective effect. Further, the present results are compatible with the $m_{\mathrm{T}}$ scaling of the $\mathrm{p\mbox{-}p}$ and p$-\Lambda$ primordial source measured by ALICE in high multiplicity pp collisions, providing compelling evidence for the presence of a common emission source for all hadrons in small collision systems at the LHC. This will allow the determination of the source function for any hadron--hadron pairs with high precision, granting access to the properties of the possible final-state interaction among pairs of less abundantly produced hadrons, such as strange or charmed particles. 612 - Cosmic Matter in the Laboratory (POF4-612) G:(DE-HGF)POF4-612 POF4-612 POF IV 0 HGS-HIRe - HGS-HIRe for FAIR (HGS-HIRe) G:(DE-Ds200)HGS-HIRe HGS-HIRe 1 SUC-GSI-Heidelberg - Strategic university cooperation GSI-U Heidelberg (SUC-GSI-HE) G:(DE-Ds200)SUC-GSI-HE SUC-GSI-HE 2 SUC-GSI-Frankfurt - Strategic university cooperation GSI-U Frankfurt/M (SUC-GSI-FR) G:(DE-Ds200)SUC-GSI-FR SUC-GSI-FR 3 SUC-GSI-Darmstadt - Strategic university cooperation GSI-TU Darmstadt (SUC-GSI-DA) G:(DE-Ds200)SUC-GSI-DA SUC-GSI-DA 4 STRONG-2020 - The strong interaction at the frontier of knowledge: fundamental research and applications (824093) G:(EU-Grant)824093 824093 H2020-INFRAIA-2018-1 5 Dataset connected to DataCite LHC LHC: ALICE EXP:(DE-588)4398783-7 EXP:(DE-H253)LHC-Exp-ALICE-20150101 EXP:(DE-H253)LHC-Exp-ALICE-20150101 0 10.17182/HEPDATA.152623.V1 Acharya, Shreyasi et.al. Heidelberg : Springer, 2025 RelatedTo GSI-2026-00065 arXiv:2311.14527 ; CERN-EP-2023-267 Common femtoscopic hadron-emission source in pp collisions at the LHC oai:repository.gsi.de:363861 openaire VDB ec_fundedresources DE-HGF Forschungsbereich Materie Matter and the Universe G:(DE-HGF)POF4-610 G:(DE-HGF)POF4-612 G:(DE-HGF)POF4 G:(DE-HGF)POF4-600 G:(DE-HGF)POF Cosmic Matter in the Laboratory 0 yes I:(DE-Ds200)ALI-20080822OR105 ALI ALICE 0 I:(DE-Ds200)DTL-20051214OR031 DTL Detektorlabor 1 I:(DE-Ds200)CIT-20110310OR121 CIT IT 2 I:(DE-Ds200)EXM-20080818OR100 EXM ExtreMe Matter Institute, EMMI 3 I:(DE-Ds200)Coll-CERN-ALICE ALICE@CERN Collaboration CERN: ALICE 4 dataset VDB I:(DE-Ds200)ALI-20080822OR105 I:(DE-Ds200)DTL-20051214OR031 I:(DE-Ds200)CIT-20110310OR121 I:(DE-Ds200)EXM-20080818OR100 I:(DE-Ds200)Coll-CERN-ALICE UNRESTRICTED