You are an expert at summarizing long articles. Proceed to summarize the following text: 
the experimentally clean signatures of @xmath0 and @xmath1bosons make the measurement of these processes in association with jets well suited to test perturbative qcd at the lhc . the processes allow for comparisons of multi  jet production with predictions either from the parton shower approach or from exact multi  parton matrix elements ( @xmath5 ) matched with parton showers . in addition , full next  to  leading order ( @xmath6 ) calculations are also available for comparison with many of the results . the @xmath7 processes also differ from pure qcd multi  jet processes with respect to the scale of the hard interaction , due to the large mass of the electroweak gauge bosons . measurements of @xmath0/@xmath1+jets are also important to control backgrounds to other measurements at the lhc . in the standard model context , one example is the top quark cross section measurements , where @xmath0+jet is often the dominant background . also several beyond the standard model searches , such as the zero lepton susy search , suffer from irreducible background from either @xmath0+jets or @xmath1+jets , or both .    here we report on the atlas @xmath1+jets and @xmath0+jets cross section measurements @xcite based on data recorded during 2010 . the analyses include the electron and muon decay channels and are based on an integrated luminosity of 33 pb@xmath8 . the atlas detector systems were all fully operational during this data taking period and the detector acceptance considered was approximately determined by the following constraints . electrons were used within the inner detector acceptance ( @xmath9 ) , whereas reconstructed muons were considered inside the acceptance of the trigger chambers ( @xmath10 ) . the electron ( muon ) @xmath11 ( @xmath4 ) was required to be larger than 20 gev , in order to be well inside the highly efficient plateau of the triggers . jets were reconstructed inside the main calorimeters ( @xmath12 ) and missing transverse energy was based on the full calorimeter acceptance ( @xmath13 ) . the cross section measurements were made within the kinematic region defined by the event selection , which was well covered by the atlas detector acceptance ,    * @xmath14 * @xmath15 * @xmath16 * @xmath17 * @xmath18    note that here the jet @xmath4 requirement , as well as the rapidity variable , differs between the @xmath0 ( 20 gev ) and @xmath1 analysis ( 30 gev ) . the @xmath19 criteria refers to the leptons and all selected jets and the @xmath1 selection also require the two leptons to be of opposite charge . the results were then corrected for detector effects , using a bin  by  bin unfolding method , and compared with theory ( @xmath20 ) predictions inside the same kinematic region . for the theory results , jets were reconstructed using the same algorithm based on all final state particles with a lifetime larger than 10 ps , except the leptons from the @xmath7 decays . lepton momenta also included any photons radiated within @xmath21 . a good agreement was generally found between the selected data candidates and predictions from mc , for both @xmath1 and @xmath0 events in both the electron and muon channels . regarding the background for these measurements , the background coming from qcd was estimated based on a data  driven method whereas the electroweak and top backgrounds were estimated from mc . the background contamination of the selected @xmath1+jets samples was of the order of 1% for the muon channel , as well as 5% for the electron channel . in the @xmath0+jets samples , the background was in the order of 10% . the main source of uncertainty in these measurements comes from the jet energy scale , which contributes with approximately 10% , followed by pile  up corrections ( @xmath22% ) and luminosity ( @xmath23% ) . more details about the analysis are found in @xcite . the obtained number of events were then used to measure the differential cross section times branching ratio with respect to a number of different quantities . all the results correspond to inclusive measurements , corrected for detector effects , within the kinematic region defined by the event selection above . as function of the number of jets ( left ) . cross section for @xmath24 as function of @xmath4 of the leading jet ( right).[fig : zw2],title="fig : " ]   as function of the number of jets ( left ) . cross section for @xmath24 as function of @xmath4 of the leading jet ( right).[fig : zw2],title="fig : " ]    the differential cross section with respect of the number of selected jets was measured both using @xmath0 and @xmath1 events . the absolute cross section and the ratio of cross sections from events with @xmath25 jets over @xmath26 jets were measured . some of the uncertainties are reduced in the ratios . figure  [ fig : zw2 ] ( left ) shows the @xmath27 cross section as a function of number of selected jets . the measured values show a good agreement with the nlo predictions , here represented by results obtained by mcfm . the results are also in good agreement with expectations from the multi  parton me programs ( alpgen and sherpa ) , which have been normalized to the inclusive nnlo cross sections obtained by the fewz program . the results do on the other hand show poor agreement with the lo plus parton shower results ( pythia ) for events with more than one jet . this is due to the combination of a not  properly  covered phase space ( @xmath1s are not produced by the parton shower ) together with using the parton shower approach for the hard jets . the results are shown together with the corresponding ratios between the results obtained from data over predictions from the mc programs mcfm , alpgen and sherpa . as function of @xmath4 of the second leading jet ( left ) . cross section for @xmath28 as function of @xmath3 ( right).[fig : zw3],title="fig : " ]   as function of @xmath4 of the second leading jet ( left ) . cross section for @xmath28 as function of @xmath3 ( right).[fig : zw3],title="fig : " ]    figure  [ fig : zw2 ] ( right ) shows the differential cross section with respect to the leading jet @xmath4 for @xmath24 . the measurement is performed separately for events with 1 to 4 jets . the results from the @xmath0+jets measurements are also compared against nlo predictions from blackhat sherpa , where @xmath0 + 3jets predictions at nlo is compared with lhc data for the first time . the results are shown together with the corresponding ratios between results from mc over data , for events with 1 and 2 selected jets . again a good agreement was found between the measurement and the mc predictions . the differential cross sections were also measured with respect to the @xmath4 of the other selected jets in the event , using the 2 leading jets in @xmath1 events and up to 4 leading jets in the @xmath0 analysis . the cross section with respect to the @xmath4 of the second leading jet is shown in figure  [ fig : zw3 ] ( left ) for @xmath29 . a good agreement is shown and similar agreements were also found with respect to the other jets , both in the @xmath0 and @xmath1 results .    in the @xmath0 analysis the cross section was also measured with respect to @xmath3 . this quantity corresponds to the scalar sum of the @xmath4 from the jets as well as leptons , i.e. muon , electron and neutrinos , in the event , and this is the quantity which was used to characterize the scale of the hard process in the mc simulations . the results from @xmath28 are shown in figure  [ fig : zw3 ] ( right ) , which are produced separately for event with 1 to 4 jets . the ratios between the results from mc over data are shown and a generally good agreement was found in both the electron as well as the muon channel .
we report on the measurements of inclusive @xmath0+jets and @xmath1+jets cross sections in proton  proton collisions at @xmath2 tev with the atlas detector . 
 cross sections , in both the electron and muon decay modes of the bosons , are presented as a function of jet multiplicity , the transverse momentum of the jets and the quantity @xmath3 which is the scalar sum of the @xmath4 in the event . 
 measurements are also presented of the ratios of cross sections . 
 the measured cross sections are compared to different particle 
 level predictions , based on perturbative qcd , where the measured @xmath0 + 3jet cross section is for the first time compared with next  to  leading order calculations . 
 address = cavendish laboratory , university of cambridge , cambridge , uk .